Under the cover of darkness
Airmen with the 1st Special Operations Logistics Readiness Squadron petroleum, oil and lubricants shop, fuel a CV-22B Osprey before a night-flying training mission on Hurlburt Field, Fla., Oct. 22, 2015. The Osprey is a tilt-rotor aircraft that combines the vertical takeoff, hover and vertical landing qualities of a helicopter with a long-range, fuel efficiency and speed characteristics of a turboprop aircraft. (U.S. Air Force photo by Senior Airman Ryan Conroy/Released)