Senior Airman Josh Serafin, 5th Aircraft Maintenance Squadron crew chief, monitors the ignition of eight B-52H Stratofortress engines at Minot Air Force Base, N.D., Jan. 26, 2017. Crew chiefs from the 5th AMXS are responsible for pre-flight inspections, safely launching and recovering the aircraft, as well as overseeing post-flight maintenance. (U.S. Air Force photo/Senior Airman J.T. Armstrong)