The Administration Building at Randolph Air Force Base is headquarters for the 12th Flying Training Wing and located at Universal City, northeast of San Antonio, county of Bexar, in the U.S. state of Texas.

[3] Clark's draft for the central building combined all administrative functions under one roof, including the water tower with a rotating beacon on the top.

[6] Clark's concept of incorporating the water tank into the building's architecture was aesthetically pleasing, but also was designed to eliminate its possibility of being the aviation hazard it might have been were it a stand-alone structure.

[2] The base water system is contained within the 500,000 US gal (1,900,000 L) tank which rests on an independent foundation inside the central octagon tower.

Beneath the water tank is the Clark Rotunda, which features four murals painted by William Dean Fausett in 1942–1944 to represent the training cadets of that era.

[13] At that time it underwent a renovation as a 772-seat auditorium,[14] and in 2013 was renamed in honor of Brigadier General Kenneth Raymond Fleenor who had been held captive and tortured for over 5 years in North Vietnam.

[15] On March 4, 1977, the Missing Man Monument by sculptor Mark Pritchett was installed in front of Building 100 by the San Antonio chapter of the Red River Valley Fighter Pilots to commemorate combat fatalities in Southeast Asia.