U.S. Army Sgt. Julio Rivera, a Black Hawk mechanic

U.S. Army Sgt. Julio Rivera, a Black Hawk mechanic with Charlie Company, 3rd Battalion, 126th Aviation Regiment (Air Ambulance), Vermont National Guard, removes an upturn exhaust system from an HH-60M Black Hawk helicopter at the Army Aviation Support Facility, South Burlington, Vt., July 14, 2016. At every 720 flight hours, Black Hawks undergo hase maintenance inspection, which requires disassembly of the aircraft. (U.S. Army National Guard photo by Spc. Avery Cunningham)