U.S. Marines with Special-Purpose Marine Air-Ground

U.S. Marines with Special-Purpose Marine Air-Ground Task Force Crisis Response-Africa board an MV-22 Osprey during an alert force drill on Moron Air Base, Spain, March 13, 2015. The alert force tested its capabilities by simulating the procedures of reacting to a real-time crisis response mission by flying to Sigonella, Italy on a moment's notice. (U.S. Marine Corps photograph by Lance Cpl. Christopher Mendoza/Released)