Francis E. Warren Air Force Base

Francis E. Warren Air Force Base is a United States Air Force installation located near Cheyenne, Wyoming. Established on July 4, 1867, as Fort David Allen Russell by the United States Army, the post originally served as a frontier infantry and cavalry garrison. The facility was renamed Fort Francis E. Warren in 1930 and transferred to the United States Air Force in September 1947. It is the oldest continuously active military installation in the Air Force.

The base is operated by Air Force Global Strike Command and serves as the headquarters for Twentieth Air Force, which commands all United States Air Force intercontinental ballistic missiles (ICBMs). The 90th Missile Wing is the host unit. The wing is organized into the 90th Operations Group, 90th Maintenance Group, 90th Mission Support Group, and 90th Security Forces Group. Assigned units include the 319th, 320th, and 321st Missile Squadrons and the 37th Helicopter Squadron. Tenant units include the 582nd Helicopter Group and the 153rd Command and Control Squadron of the Wyoming Air National Guard.

The 90th Missile Wing operates a fleet of LGM-30G Minuteman III ICBMs. These assets are distributed across missile alert facilities and launch facilities located in Wyoming, Nebraska, and Colorado. The 37th Helicopter Squadron operates UH-1N Twin Huey helicopters for tactical response missions. Infrastructure includes more than 220 historic red brick buildings and a 90,000-square-foot underground reinforced concrete Weapons Storage and Maintenance Facility. The installation does not have a paved runway for fixed-wing aircraft but maintains two concrete helipads and two turf short takeoff and landing (STOL) runways. The base is also designated as a Superfund site due to soil and groundwater contamination.