The 321 Contingency Response Squadron (CRS) is a unit within the Air Mobility Command (AMC) of the United States Air Force. This squadron specializes in providing rapid air mobility capabilities to respond to contingencies worldwide, including disaster relief operations and combat missions. The 321 CRS operates C-17 Globemaster III aircraft, which are designed for strategic airlift and have the ability to transport large payloads over long distances. The squadron is based at Joint Base Elmendorf-Richardson in Alaska, but its operations can extend globally as needed.