U.S. Air Force Staff Sgt. Jacob Costello, 860th Aircraft

U.S. Air Force Staff Sgt. Jacob Costello, 860th Aircraft Maintenance Squadron C-17 flying crew chief, moves the wheel chocks before a C-17 Globemaster III aircraft from Travis Air Force Base, Calif., loaded with humanitarian aid departs Joint Base San Antonio-Lackland Kelly Field, Texas, Sept. 23, 2017. The C-17 was loaded with 105,000 pounds of water and MREs that were delivered to St. Croix, Virgin Islands after the island had sustained damage from Hurricane Maria. (U.S. Air Force Photo by Master Sgt. Joseph Swafford)