Air Force Staff Sgt. Charles Palmer completes preflight checks on a C-17 Globemaster III aircraft before leaving Travis Air Force Base, Calif., to deliver Denton Program cargo to Guatemala, April 19, 2018. Palmer is a loadmaster assigned to the 21st Airlift Squadron. The Denton Program is a Defense Department transportation program that moves humanitarian cargo donated by U.S.-based nongovernmental organizations to developing nations to ease human suffering. Air Force photo by Master Sgt. Joey Swafford