A maintainer from Royal Air Force Lakenheath's 56th Helicopter Maintenance Unit inspects a U.S. Air Force HH-60G Pave Hawk helicopter assigned to 56th Rescue Squadron during exercise Joint Warrior 15-1 in Scotland, April 20, 2015. Maintainers work day and night shifts to ensure the helicopters are in pristine condition for flight operations during training operations. (U.S. Air Force photo by Senior Airman Erin O'Shea/Released)