A MV-22 Osprey stands by on the tarmac before beginning its flight at Marine Corps Air Station Yuma, Ariz., April 23. In support of the Weapons and Tactics Instructors Course 2-13, an Osprey at MCAS Yuma transported Marines from 1st Battalion, 6th Marine Regiment, based out of Camp Lejeune, N.C., to the final portion of the exercise.