Fourth Air Force units routinely support United Nations and Department of State missions. Fourth Air Force people were on the first teams into Haiti for Operation Uphold Democracy, and supported Vigilant Warrior and Desert Thunder deployments to Southwest Asia. The men and women of Fourth Air Force continue to perform international peacekeeping and humanitarian missions on an almost daily basis. Headquarters Fourth Air Force officially returned to its original home, now March Air Reserve Base, in Riverside, CA, in April, 1998.