Crew chiefs assist aircrew with LOX
Airman 1st Class Mark Sherwood, left, and Staff Sgt. Luke Brackin, 1st Special Operations Aircraft Maintenance Squadron crew chiefs, read a technical order while starting up a liquid oxygen cart on the flightline at Hurlburt Field, Fla., Jan. 13, 2014. Technical orders are step-by-step instruction manuals maintainers use to fix equipment. (U.S. Air Force photo/Senior Airman Krystal M. Garrett)