Observe and Assist U.S. Air Force Tech. Sgt. Tim Chase flies aboard an Afghan air force Mi-17 helicopter near Kabul, Afghanistan, Dec. 7, 2015. Chase is a flight engineer assigned to the Train, Advise, Assist Command-Air. U.S. Air Force photo by Staff Sgt. Corey Hook SHARE: Download: Full Size (0.56 MB) Tags: KABUL, Photo Essays, Mi-17 helicopters, afghanistan, All images Credit: Staff Sgt. Corey Hook VIRIN: 151207-F-ZU607-549.JPG Photo Gallery