USAF has a long history with the UH-1 Huey.
USAF UH-1s do missile silo support and ferrying of Security Police teams in both site security as well as convoy escort for missiles. These units also do civil SAR when hoist aircraft are needed, as well as HEMS in an Army MAST-style role if situations require it and civilian EMS helos aren't available. In fact, the UH-1N unit at Fairchild, which primarily supports the USAF land survival school, gets a ton of civil SAR rescues and is considered to be such an asset, that when the USAF was considering shutting them down, the state of Washington when full-on politicking to keep them. There are also two or three squadrons that do VIP support, with the D.C. unit having some secret squirrel stuff were there to be a national emergency. There used to be actual CSAR units that had UH-1Ns, but all of those are HH-60s now. In the aforementioned roles, the USAF had HH-1Hs and HH-1Ns, with the Hs being retired in the mid-90s. The UH-1Ns are supposed to be getting replaced, but have soldiered on quite well, most of them being 1969-early 70s models.
Up until the mid-1980s, the USAF operated UH-1F models as local base SAR aircraft and range support aircraft. These were unique to the USAF in that they are the "shorty" fuselage UH-1s, like a UH-1B/C, but have the Lycoming L-9/11 replaced by a GE T58 engine, since the USAF had a surplus of those. Because of the way the T58 is mounted, the tailpipe of a normal Huey is covered with a fairing, and the exhaust comes out of the right side of the engine compartment. Another model of the UH-1F, the UH-1P, was used as a USAF gunship for supporting ground troops during and immediately after the Vietnam War, before being retired.
In order below: UH-1F, UH-1P gunship (note exhaust on right side, and rear of engine exhaust covered over), VH-1N VIP Twin Huey, HH-1N Twin Huey, HH-1H SAR Huey
