What follows is an opinion from a United States Court of Appeals. Your task is to identify the type of district court decision or judgment appealed from (i.e., the nature of the decision below in the district court).

Opinion:
James Gordon PENN, Plaintiff-Appellant, v. Clara RINALDI, doing business under the firm name and style of Queens Truck Rental, Defendant, and Mack Trucks Inc., Defendant-Appellee.
No. 9, Docket 28122.
United States Court of Appeals Second Circuit.
Argued Oct. 1, 1963.
Decided Oct. 1, 1963.
Joseph K. Guerin, New York City (Myers & Guerin, New York City, on the brief), for plaintiff-appellant.
John B. Shields, New York City (John L. Quinlan, Bigham, Englar, Jones & Houston, New York City, on the brief), for defendant.
David S. Konheim, New York City (Konheim & Halpem, New York City, on the brief), for defendant-appellee.
Before LUMBARD, Chief Judge, and FRIENDLY and SMITH, Circuit Judges.
PER CURIAM.
In open court we affirm the judgments of the District Court for the Southern District of New York which dismissed the complaint against the defendants Clara Rinaldi, doing business under the firm name and style of Queens Truck Rental, and against Mack Trucks, Inc. because of a prior judgment dismissing a similar complaint pursuant to Rule 41(b) of the Federal Rules of Civil Procedure for failure to prosecute. The effect of such a dismissal, prescribed by the Rule itself, is a matter of federal law, Kern v. Hettinger, 303 F.2d 333 (2 Cir., 1962)

Question: What is the type of district court decision or judgment appealed from (i.e., the nature of the decision below in the district court)?

Choices:
Trial (either jury or bench trial)
Injunction or denial of injunction or stay of injunction
Summary judgment or denial of summary judgment
Guilty plea or denial of motion to withdraw plea
Dismissal (include dismissal of petition for habeas corpus)
Appeals of post judgment orders (e.g., attorneys' fees, costs, damages, JNOV - judgment nothwithstanding the verdict)
Appeal of post settlement orders
Not a final judgment: interlocutory appeal
Not a final judgment: mandamus
Other (e.g., pre-trial orders, rulings on motions, directed verdicts) or could not determine nature of final judgment
Does not fit any of the above categories, but opinion mentions a "trial judge"
Not applicable (e.g., decision below was by a federal administrative agency, tax court)

Answer: 4