U.S. Air Force Staff Sgt. Gabriel Walker, 60th Maintenance Group Maintenance Operations Center senior maintenance controller, coordinates with higher headquarters to send a maintenance recovery team to Joint Base Pearl Harbor-Hickam, Hawaii, Jan. 25, 2019 at Travis Air Force Base, Calif. The MOC coordinates maintenance actions for all aircraft at Travis and Travis aircraft flying missions all over the world. (U.S. Air Force photo by Tech. Sgt. James Hodgman)