U.S. Navy Lt. John Lina dismounts a Mine-Resistant Ambush-Protected Egress vehicle rollover simulator here during Operational Contract Support Joint Exercise 2015, March 16, 2015. The exercise involves roughly 1,000 Soldier, Sailors, Airmen, Marines, civilians and coalition partners. Lina is a contracting officer with the Navy Operations Support Center in Orlando, Fla. (U.S. Air Force photo by Staff Sgt. Veronica Montes)