U.S. Air Force Staff Sgt. David Billings, a C-130H Hercules aircraft flight engineer, consults charts to calculate takeoff and landing data before a flight out of Bagram Airfield, Parwan province, Afghanistan, Jan. 9, 2014. The aircraft was the first C-130H to be permanently relocated out of the base in order to be replaced with newer C-130J Super Hercules aircraft.(Portions of this image were blurred for security reasons.)