CRW takes Small Unmanned Aircraft System for test flight, demonstrates capabilities Published July 26, 2020 By Tech. Sgt. David W. Carbajal 621st Contingency Response Wing Public Affairs TRAVIS AIR FORCE BASE, Calif. -- Members of the 921st Contingency Response Squadron performed their first on-base flight of the newly acquired Small Unmanned Aircraft System July 17, 2020, on Travis Air Force Base, Calif. The sUAS is a recent addition to the 621st Contingency Response Wing’s capabilities and is projected to be used as a force protection aid to observe potential threats during daytime and nighttime hours.