Eglin Air Force Base (AFB) (IATA: VPS, ICAO: KVPS, FAA LID: VPS) is a United States Air Force base located approximately 3 miles (5 kilometers) southwest of Valparaiso, Florida in Okaloosa County.
The 72d Test and Evaluation Squadron is part of the 53d Wing at Eglin Air Force Base, Florida.
 The squadron is geographically separated but operated from Whiteman Air Force Base, Missouri.
 It conducts testing and evaluation of the B-2 Spirit aircraft.
The 46th Test Group was a United States Air Force unit active from 1992 to 2012.
 It was last active with 46th Test Wing, at Eglin Air Force Base, Florida.
 The 46th Test Group was stationed as a tenant unit at Holloman Air Force Base, New Mexico, throughout its existence.
 It was inactivated on 18 July 2012, being replaced by the 96th Test Group in an administrative reorganization.
The 556th Test and Evaluation Squadron is a United States Air Force unit.
 It is assigned to the 53d Test and Evaluation Group at Creech Air Force Base, Nevada, and conducts unmanned aircraft testing.
The 28th Test and Evaluation Squadron is an active United States Air Force unit.
 Its current assignment is with the 53d Wing, based at Eglin Air Force Base, Florida.
The 31st Test and Evaluation Squadron (31 TES) is a United States Air Force unit, assigned to the 53d Test and Evaluation Group, stationed at Edwards Air Force Base, California.
 The 31 TES is an Air Combat Command (ACC) tenant unit at Edwards, providing personnel to support combined test and evaluation on Air Force weapons systems.
The 96th Test Wing is a United States Air Force unit assigned to the Air Force Test Center of Air Force Materiel Command at Eglin Air Force Base, Florida.
 The wing was activated at Eglin in 1994 as the 96th Air Base Wing, the headquarters for all support units on Eglin, the largest installation in the Air Force.
 In 2012, it absorbed the mission and resources of the 46th Test Wing and added the mission of testing and evaluating weapons, navigation and guidance systems and command and control systems.
The Holloman High Speed Test Track (HHSTT) is a United States Department of Defense/Air Force aerospace ground test facility located at Holloman Air Force Base in south-central New Mexico.
 It is adjacent to the White Sands Missile Range and is operated by the 846th Test Squadron of the 96th Test Group of the 96th Test Wing at Eglin Air Force Base.
 The Test Track provides its services to a wide variety of American defense and governmental agencies such as the Air Force, Army, Navy, and the Missile Defense Agency, as well as America's allies.
The 14th Test Squadron is a United States Air Force unit located at Schriever Air Force Base, Colorado.
 It is an Air Force Reserve unit that augments the 17th Test Squadron.
 The squadron is responsible for testing and evaluating space systems and associated support equipment.
 The unit was originally established in 1972 as the 14th Missile Warning Squadron.
 The missile warning squadron was an active duty unit that operated early warning radars at eight locations around the United States until it was inactivated in 1980.
 The squadron was reactivated and given its current space test mission in 2000.
The 49th Test and Evaluation Squadron is an active United States Air Force unit.
 Its current assignment is with the 53d Wing, based at Barksdale Air Force Base, Louisiana.

Question: The 28th Test and Evaluation Squadron of the Air Force operating out of Okaloosa County in Florida is based at which Air Force base?
Answer: Eglin Air Force Base