U.S. Air Force Airman 1st Class Trevor Krutsch performs preflight checks on an HH-60 Pave Hawk helicopter on Bagram Airfield, Afghanistan, Dec. 26, 2015. Krutsch, a crew chief assigned to the 455th Expeditionary Aircraft Maintenance Squadron, ensure Bagram’s combat search and rescue helicopters are ready to fly at a moment’s notice. U.S. Air Force photo by Tech. Sgt. Robert Cloys