What follows is an opinion from a United States Court of Appeals.
Intervenors who participated as parties at the courts of appeals should be counted as either appellants or respondents when it can be determined whose position they supported. For example, if there were two plaintiffs who lost in district court, appealed, and were joined by four intervenors who also asked the court of appeals to reverse the district court, the number of appellants should be coded as six.
When coding the detailed nature of participants, use your personal knowledge about the participants, if you are completely confident of the accuracy of your knowledge, even if the specific information is not in the opinion. For example, if "IBM" is listed as the appellant it could be classified as "clearly national or international in scope" even if the opinion did not indicate the scope of the business. 

Your task concerns the first listed respondent. The nature of this litigant falls into the category "federal government (including DC)", specifically "other, not listed, not able to classify". Your task is to determine which specific federal government agency best describes this litigant.

Opinion:
Anna JENNINGS, Administratrix of the Estate of Stewart Earl Jennings, deceased; State of Maryland, to use of Anna Jennings, surviving wife, Anna Frances Jennings, a minor, Russell Earl Jennings, a minor, Gregory Stewart Jennings, a minor, and the unborn child or children, en ventre sa mere, of Stewart Jennings; Margaret M. Jennings, in her own right as mother and next friend of Donald S. Jennings and Donald S. Jennings in his right, Appellants and Cross-Appellees, v. UNITED STATES of America, Appellee and Cross-Appellant.
No. 8117.
United States Court of Appeals Fourth Circuit.
Argued Oct. 11, 1960.
Decided May 4, 1961.
David L. Rose, Atty., Dept, of Justice, Washington, D. C. (George Cochran Doub, Asst. Atty. Gen., Leon H. A. Pierson, U. S. Atty., Baltimore, Md., and Morton Hollander, Atty., Dept, of Justice, Washington, D. C., on brief), for appellee and cross-appellant.
Paul R. Connolly, Jr., Washington, D. C. (David N. Webster, and Hogan & Hartson, Washington, D. C., on brief), for appellants and cross-appellees.
Before SOBELOFF, Chief Judge, HAYNSWORTH, Circuit Judge, and STANLEY, District Judge.
HAYNSWORTH, Circuit Judge.
The tragedy out of which these cases arose occurred in Maryland on a highway constructed and maintained by the United States Government. On the morning of January 23, 1956, Stewart Earl Jennings, a civilian employee of the United States, was driving his automobile from his home in Maryland to his place of work in the District of Columbia. Stewart’s brother, Donald S. Jennings, was a passenger in the car. At about 7:30 a. m., while driving on Suitland Parkway in Maryland, a highway under the control of the National Capital Park Bureau, Department of the Interior, Stewart’s automobile skidded on a patch of ice on the road, went out of control, and collided with an oncoming automobile in the opposite lane of traffic. Stewart Jennings was killed and his brother, Donald, was seriously injured.
Thereafter, based upon the alleged negligence of the United States, three suits were filed under the Tort Claims Act, 28 U.S.C.A. §§ 1346, 2674, in the United States District Court for the District of Maryland. The Administratrix of Stewart Jennings’ estate brought, an action for Stewart’s conscious pain and suffering before death, for loss of his automobile, and for funeral and burial expenses. An action was also-brought to the use of Stewart’s widow and four children under the Maryland Lord Campbell’s Act, Code 1957, art. 67, § 1 et seq., for damages resulting from his alleged wrongful death. There was-a third suit based on the injuries suffered by Stewart’s brother, Donald Jennings.
In a lengthy trial, much evidence was-presented bearing on the construction of the road at the particular place, the-weather conditions preceding the time of the accident, the driving hazard at this point, the notice, actual or constructive, chargeable to the Government of the existence of the ice, the alleged contributory negligence of Stewart Jennings, and the amount of damages. The District Judge found the Government negligent and Stewart Jennings free from contributory negligence. The detailed evidence relating to these questions, together with the findings of the District Judge, are set forth in the Judge’s comprehensive opinion. Jennings v. United States, D.C.Md.1959, 178 F.Supp. 516. Damages in the sum of $850 were awarded in the Administratrix’s suit, $83,700 in the wrongful death action, and $21,978 in favor of Donald Jennings. The plaintiffs have appealed, contending that in several respects the District Court erroneously calculated damages, and the Government has cross-appealed, raising issues of liability and contributory negligence, and it also attacks the computation of damages.
The principal issue is raised by the Government and concerns the extent of a defendant’s liability for injuries caused by icy conditions on a roadway under its control. As the accident happened in Maryland, the law of that state is to be applied.
Suitland Parkway, built by the United States Army Engineers in 1944 as a military highway, runs in a generally east-west direction from Andrews Air Force Base on the East to South Capital Street in the District of Columbia on the West. On that portion of it where the accident occurred it has a concrete surface providing two traffic lanes, one for traffic moving in each direction. As modern highways are, it is banked on curves and, at the point where the accident occurred, there is a slight curve so that the northern edge of the highway is slightly higher than the southern edge. Necessarily, water from melting ice and snow piled on the shoulder of the high side of the roadway will drain across the highway surface.
On Thursday, January 19, 1956, there had been a heavy snow. Plows had removed the snow from most of the road surface, piling it up on the edges of the road and on the shoulders. Sunday, January 22, was warm and the accumulated snow and ice was melting. In many places, water from melting snow was draining across the roadway. The thawing conditions continued in general throughout the night of the 22nd-23rd. The official temperatures at the Washington National Airport show that the temperature fell on the afternoon and evening of the 22nd from a high of 46° F. at 3:00 o’clock in the afternoon to 37° F. at midnight. The reading was 36° F. at 1:00 a. m. and at 2:00 a. m. on the morning of the 23rd. It dropped to a low of 35° at 3:00 a. m., and was back up to 37° at 4:00 a. m. on that morning. It was again 36° at 5:00 o’clock and at 6:00 o’clock, and climbed again to. 37° at 7:00 o’clock, and that reading was also recorded at 8:00 o’clock. The temperature fell again to 35° at 9:00 o’clock and to 32° at 10:00 o’clock on the morning of the 23rd.
Despite the fact that the official records indicated that the temperatures at the Washington National Airport were above freezing throughout the night of January 22-23, one witness testified that between 10:00 and 11:00 o’clock on the evening of the 22nd, he saw a patch of ice at an unspecified point on the highway and felt his rear wheels slip as he passed over it. One of the officers who patrolled the highway that night felt his wheels spin when he passed over what he supposed to be patches of ice while on his way to work, but he testified that when he looked for it later, while on his official patrols, he found no ice. Mrs. Jennings’ brother and sister, in separate automobiles, each testified that a patch of ice was encountered on the parkway around midnight. A number of witnesses traveling on the highway between approximately 6:00 o’clock and 7:30 o’clock on the morning of the 23rd testified that they saw or felt themselves passing over a patch of ice at a point approximately seven-tenths of a mile east of Forestville Road, the point where the accident occurred. There was no specific testimony that ice was at that particular place at an earlier hour. Unquestionably, there was a patch of ice on the roadway, observed by many witnesses, shortly after the accident. One of the officers investigating the accident called for sand, but, inexplicably, when the sand truck arrived at approximately 8:15 o’clock there was no longer any ice though the surface of the highway was wet from the melting snow, and though the official weather reports indicate that the temperatures were falling after 8:00 o’clock that morning and reached 32° F. by 10:00 o’clock.
Suitland Parkway is maintained by the National Capital Park Bureau. The officers on duty on the night of January 22-23, including the one who thought from the feel of his wheels that he had passed over patches of ice on his way to work prior to 11:00 o’clock on the evening of the 22nd, testified that they encountered no ice on their patrols, though they were looking for it and though they made some six or seven round trips over the entire length of the highway during the night. There were two places, not the scene of the accident, one at the intersection of an access road and another where there was an overpass, which they thought prone to become icy when the rest of the roadway was unfrozen. Those two places they particularly checked, and at one of them one of the officers got out of the car to make certain by the feel of his foot that the substance on the roadway was indeed water and not ice.
Throughout the night of January 22-23, as on other similar nights in the wintertime, there was a loaded sand truck available on call to sand the roadway in the event of icing. The sand truck could have been summoned by the patrolling officers by use of their radio, but the official log disclosed no request for sand and the patrolling officers testified they requested no sand, for they encountered no ice.
Nevertheless, and though there was only water on the roadway, shortly after 8:00 o’clock, as we have indicated, there clearly was a patch of ice on the roadway at or near the point where Stewart Jennings lost control of his automobile at approximately 7:30 o’clock on the morning of the 23rd, with the result that there was a head-on collision with a vehicle proceeding in the opposite direction.
The District Judge found that the patch of ice, observed by many witnesses during the early hours of daylight on the 23rd, had formed sometime prior to midnight. He concluded that it was a dangerous condition which the patrolling officers discovered, or should have discovered, and that they should have taken steps to mitigate the danger it posed for traveling motorists. Since they had done nothing to eliminate the condition, he held that the United States was liable for the resultant injuries under the Tort Claims Act.
The principle that a municipality is bound to abate nuisances in the highways under its control if it knows of them, or should have known of them, has been applied with a soft hand by the Maryland courts to snow and ice. As he indicates in his concurring opinion, Chief Judge Sobeloff construes the Maryland cases to impose absolutely no duty upon a municipality to remove even occasional ice or snow from a highway under its control, to sand it or to warn of its presence, unless its presence is attributable, at least in part, to some 'other fault or wrong of the municipality. As we read the Maryland cases, they do not go that far, but the Courts of that state have certainly been careful to impose no unreasonable burden upon municipalities with respect to the prevention or removal of natural snow or ice.
In the early case of Mayor and City Council of Baltimore v. Marriott, 1856, 9 Md. 160, 66 Am.Dec. 326, it was established that the City permitted ice to remain upon a sidewalk for a long time. A pedestrian slipped upon it and injured himself. The municipality was held responsible because the condition amounted to a nuisance which the municipality should have abated.
The duty of municipalities to remove snow and ice from sidewalks has been imposed in Maryland against a background of a municipality’s power to require the occupants of adjacent land to effect the removal of snow and ice from the sidewalks. Under such ordinances, the municipality, itself, is required only to remove snow and ice which the occupant of the adjacent land neglects to remove after a reasonable time, and this activity of the municipality may be done at the expense of the occupant who is required by the ordinance to clear the sidewalk.
With respect to ice and snow in the streets, however, the Maryland courts have imposed no duty upon municipalities to remove general ice or snow, for to do so, they have thought, would have imposed unreasonable burdens upon the municipality. In Magaha v. Mayor, etc., of City of Hagerstown, 1902, 95 Md. 62, 51 A. 832, 835, the Court of Appeals of Maryland declared emphatically :
“ * * * In order that we may not be misunderstood, we desire to emphasize the fact, at the risk of repetition, that we do not mean to say that the appellee (a municipality) would be liable if this ice was simply the result of snow or rain, or both, falling and then freezing. If it had been, and if the ice thereby formed was in large quantities in the streets, it would be exacting too much to require the municipal authorities to remove it. * * * ”
The case of Flynn v. Canton Co. of Baltimore, 1874, 40 Md. 312, 17 Am.Rep. 603, did not involve the liabilities of a municipality. The plaintiff there had slipped upon ice on a sidewalk in front of a market operated by the defendant. The suit was brought against the merchant on the theory that the city ordinance requiring the occupant of the store to remove ice from the sidewalk created a duty running to the general public. The court held, however, that the duty imposed by the ordinance upon the merchant ran only to the city, enforceable only by penalty or by exercise of the city’s right to remove the snow and ice and to charge the storekeeper for the cost of the work. Once the court concluded that the city ordinance imposed upon the occupant of the adjacent land no duty of care with respect to ice on the sidewalk running to passers-by using the sidewalk, there was no basis for imposing any civil liability upon the storekeeper for the injury sustained by the pedestrian unless, of course, the storekeeper had caused the ice to be present. Once the city ordinance was eliminated as a basis for recovery by the pedestrian, there remained no basis for imposing civil liability upon the occupant of adjacent land for ice or snow in a public way not under his control to any greater extent than there would be for any other defect in a highway adjacent to the occupant’s land.
The holding that the occupant of adjacent land may not be held liable for injuries sustained by a member of the public using the public highway not under the control of the land occupant neither requires nor suggests the conclusion that a municipality which does have control of the highway in which a defect is permitted to exist for an unreasonable period of time may not be held civilly liable if injuries are sustained because of the defect. With respect to defects other than ice and snow, such liabilities are imposed in Maryland upon municipalities having control of the highways, though there would be no basis for imposing any such liability upon the occupant of adjacent land. The duties of a municipality with respect to ice and snow in the streets it maintains are not to be measured by the duties of adjacent landowners with respect to defects in the highways which they do not maintain and for which they are not responsible.
That a municipality in Maryland does have some duty with respect to occasional ice and snow in the streets it maintains appears to have been the clear holding in Magaha v. Mayor, etc., of City of Hagerstown, 1902, 95 Md. 62, 51 A. 832, a case subsequent to Flynn. There it appeared that ice had been formed of water discharged in the street from a saloon. Though the ice had been present for a long time the municipality made no effort to do anything about it. The court concluded that the long existing patch of ice in the street was a nuisance, and that the municipality was liable to the plaintiff for the damages he sustained when he was injured on the ice. It may be that the saloon keeper could also have been held responsible for the plaintiff’s injuries, for he discharged the water into the street, which, freezing, created the ice, but there is nothing in the case to suggest that an innocent occupant of adjacent land could have been held liable for the saloon keeper’s conduct, or for the municipality’s neglect over a long period to do anything to abate the nuisance. Maryland’s Court of Appeals seems to have been applying the usual rule with respect to defects in a public way permitted to remain for such length of time as to become a nuisance, for, with respect to this isolated patch of ice, the burden resulting from imposition of a duty of abatement was slight, thus distinguishing that case from the general rule that Maryland municipalities need do nothing about general ice or snow.
Under the Maryland eases, the municipality is not required to do the impossible, to prevent snow from falling in the streets, as the court observed in Magaha, or even the very onerous. It is required to do what is reasonable and not burdensome to it. It need not remove general snow, but it may be required to remove, sand or warn an unsuspecting public of, a lone and isolated patch of ice long remaining in a public street, depending, in each instance, upon reasonableness.
Though we think the Maryland cases do not require a conclusion that a municipality need do nothing at any time about occasional ice or snow naturally formed in its streets, the duties imposed with respect to ice or snow in the roadway, as distinguished from sidewalks which occupants of adjacent land may be required to clear, are minimal. The courts of that state have clearly indicated that the public should suffer the inconvenience and danger of ice and snow in the streets rather than having the municipalities burdened with duties of large and expensive operations to remove it.
Though nothing in the Maryland law required it do so, the United States did remove the general snow of January 19, 1956 from most of the surface of the roadway, piling it on the edges of the road and on the shoulders. No one suggests that this substantial clearance of the highway required the United States to go further and remove the piles of snow from the edges of the road and from the shoulders or to take other steps to prevent drainage across the road from the piles of snow on the edges and shoulders, particularly snow on the high side of the banked curves. It was required only to inspect the road at reasonable intervals and to sand occasional patches of ice, or take other reasonable steps to diminish their danger, within a reasonable time after they were discovered or reported.
The United States did all that was required of it and more. It patrolled the highway at frequent intervals throughout the day’and night. It maintained a loaded sand truck so that it might promptly respond at any hour to a call for sand. Except at the one place where one patrolman got out of the car to feel the surface of the road with his feet, the patrolmen did not examine the surface of the road more closely than could be done from their moving car. Bearing in mind the thawing conditions and the official temperature reports, however, no basis appears for a finding that due care required closer or more frequent inspections.
In those Maryland cases in which occasional ice on sidewalks or in the streets has been held to be a nuisance which the municipality should have abated, the ice had been present for many days. Here, in contrast, the ice had formed only a few hours before the accident. The accident occurred shortly after daybreak. The fact that the ice was neither reported nor discovered during the early morning hours of darkness, under the conditions then prevailing, does not lead to the conclusion that the United States should have taken additional precautions. Maryland’s leniency with municipalities in snow and ice cases is not consistent with a requirement that occasional ice, naturally formed, must be discovered and dealt with under these circumstances in so short a period of time.
We conclude that proof of the presence of the patch of ice that morning and of the fact that Jennings’ car skidded upon it was not enough to support the judgment. There was other evidence, however, which might support recovery upon a different theory.
There was testimony that the roadway at this point is in a shallow cut and that beyond the northern shoulder of the highway was a slight swale or drainage ditch, constructed apparently for the purpose of diverting from the roadway water draining down the embankment. There was testimony that the swale was inadequate for that purpose, and, at least, a suggestion that the water on the roadway came not from the snow piled on the edge of the roadway and the shoulders, but from the embankment on the other side of the swale. The testimony about the construction and condition of the swale was accepted by the District Court only for the purpose of showing notice to the United States that water might be expected to drain across the roadway at this particular point and, in freezing weather, to freeze. He made no findings, and none were requested of him, as to what, if any, contribution the condition of the swale made to the formation of the ice patch with which we are concerned.
Though there was testimony that water was draining across the highway at many places, the plaintiffs’ testimony may be susceptible of an inference that water drained across the roadway only at this particular place and at no other, and that the condition of the swale was the cause of the drainage.
If it were the fact that because of the condition of the swale water drained across the roadway at this particular point, forming ice during freezing conditions, and that the patch of ice on the particular morning was attributable to that condition, it might be concluded that the United States in the exercise of due care should have deepened the swale to eliminate the drainage across the roadway and the formation of dangerous ice whenever thawing conditions were followed by freezing temperatures.
In Maryland it has been held that there is no liability for injuries caused by a design defect in a highway, but if a defect, whether of design or not, creates a condition which would itself constitute a nuisance, reasonable care to abate it is not exercised and the condition is the effective cause of the injury, no reason presently appears why the agency charged with maintenance of the highway should not be responsible as for any other nuisance it unreasonably permitted to exist.
The District Court has made no findings on the subject. Until the District Judge has sifted the proof heard by him, we need not consider its sufficiency to support hypothetical findings, or decide whether any hypothetical findings would be sufficient to bring the plaintiff within the rule permitting recovery on the theory that the swale created a nuisance which the United States in the exercise of due care should have abated, and that this nuisance was the cause of the accident. Instead, we think it appropriate to remand the case to the District Court for further proceedings and additional findings of fact, with leave, in his discretion, to receive additional testimony bearing upon the remaining questions.
In its cross-appeal the Government also maintains that under the evidence Stewart Jennings was, as a matter of law, contributorily negligent. The issue of contributory negligence is normally for the trier of the facts, and, upon the evidence in this case, we cannot say that the District Judge was clearly wrong in finding Jennings’ conduct free of negligence. See: Magaha v. Mayor, etc., of City of Hagerstown, 1902, 95 Md. 62, 51 A. 832; Canton Co. of Baltimore v. Seal, 1923, 144 Md. 174, 125 A. 63.
Additionally, two questions relating to damages are raised by the United States. First, it is asserted that the Civil Service Retirement Act, 5 U.S.C.A. § 691 et seq., benefits received by Stewart Jennings’ dependents after his death should have been taken into consideration in determining damages in the wrongful death action. In United States v. Price, 4 Cir., 1961, 288 F.2d 448, we recently held that these civil service benefits are from a “collateral source,” and, therefore, under the law of Virginia, should not be offset against a tort claims award. The Maryland cases also recognize the rule that benefits from a “collateral source” should not be considered in fixing damages in a tort action, Plank v. Summers, 1954, 203 Md. 552, 102 A.2d 262, and cases therein cited. Thus, it was no error to disregard such benefits to Jennings’ dependents.
The Government also insists that the District Court, in computing damages in the death action, should have deducted from the award prospective income taxes that the decedent would have had to pay on his future earnings. Without intending to express an opinion on the propriety of such deduction, we note that the District Judge stated that “the decedent’s liability for taxes has been considered as one of the relevant elements in fixing the award,” Since this item evidently was considered, the Government has no cause to complain.
Finally, the plaintiff’s brief raised several questions relating to damages. While these were not pressed in oral argument, we have examined the contentions and find no reversible error.
For the reasons stated, the judgments appealed from are
Vacated and the case remanded for proceedings not inconsistent with this opinion.
. The readings were actually taken at approximately twenty minutes after the hour.
. Similar ordinances have received a similar construction. See, for instance, Smith v. District of Columbia, 89 U.S.App.D.C. 7, 189 F.2d 671, 39 A.L.R.2d 773.
. Generally, the occupant of land has no duty to remove or warn the public of defects in a public highway adjacent to the land he occupies when the highway is neither maintained by him nor under his control, unless he creates the defect. See Restatement of Torts, § 349.
. Mayor & City Council of Baltimore v. Pendleton, 1860, 15 Md. 12; Anne Arundel County Commissioners v. Duckett, 1864, 20 Md. 468; Eyler v. Allegany County Commissioners, 1878, 49 Md. 257; Taylor v. Mayor, etc., of the City of Cumberland, 1885, 64 Md. 68, 20 A. 1027; Hitchins v. Town of Frostburg, 1887, 68 Md. 100, 11 A. 826; Cochrane v. Mayor, etc., of City or Frostburgh, 1895, 81 Md. 54, 31 A. 703, 27 L.R.A. 728; Keen v. Mayor, etc., of City of Havre de Grace, 1901, 93 Md. 34, 48 A. 444; Mayor, etc., of City of Hagerstown v. Klotz, 1901, 93 Md. 437, 49 A. 836, 54 L.R.A. 940; Mayor, etc., of Baltimore City v. Beck, 1903, 96 Md. 183, 53 A. 976; Mayor and City Council of City of Havre de Grace v. Fletcher, 1910, 112 Md. 562, 77 A. 114; Mayor, Counselor, and Aldermen of City of Annapolis v. Stallings, 1915, 125 Md. 343, 93 A. 974; Commissioners of Delmar v. Venables, 1915, 125 Md. 471, 94 A. 89; Mayor, etc., of City of Hagerstown v. Crowl, 1916, 128 Md. 556, 97 A. 544; Mayor, etc., of Baltimore v. Bassett, 1918, 132 Md. 427, 104 A. 39; County Commissioners of Washington County v. Gaylor, 1922, 140 Md. 375, 117 A. 864; Mayor and City Council of Baltimore v. Eagers, 1934, 167 Md. 128, 173 A. 56; Mayor and City Council of Baltimore v. Thompson, 1937, 171 Md. 460, 189 A. 822; Neuenschwander v. Washington Suburban Sanitary Commission, 1946, 187 Md. 67. 48 A.2d 593; East Coast Freight Lines, Inc. v. Mayor & City Council of Baltimore, 1948, 190 Md. 256, 58 A.2d 290, 2 A.L.R.2d 386.
. Unlike some other jurisdictions, Maryland imposes no greater liabilities upon municipalities for man-made piles of natural snow and ice than for ice and snow in their natural states. See Magaha v. Mayor, etc., of City of Hagerstown, 1902, 95 Md. 62, 51 A. 832.
. It would be expected to do that at every point at which snow was piled on the high side of the banked curve, and photographs made shortly after the accident show snow piled on the edge of the roadway and on the shoulders.
. Mayor and City Council of Cumberland v. Turney, 1939, 177 Md. 297, 9 A.2d 561.

Question: This question concerns the first listed respondent. The nature of this litigant falls into the category "federal government (including DC)", specifically "other, not listed, not able to classify". Which specific federal government agency best describes this litigant?

Choices:
United States - in corporate capacity (i.e., as representative of "the people") - in criminal cases
United States - in corporate capacity - civil cases
special wartime agency
Other unlisted federal agency (includes the President of the US)
Unclear or nature not ascertainable

Answer: 0