(From left) U.S. Army Pvt. Anthony Keough and Cody Shaffer, Advanced Individual Training students assigned to the 2nd Battalion, 210th Aviation Regiment, inspect a Chinook T-55 engine “hot end” during training at Fort Eustis, Va., Feb. 20, 2013. The battalion's AIT Soldiers train on engine and transmission maintenance primarily for the CH-47 Chinook and UH-60 Black Hawk helicopters throughout the course of their training assignment. (U.S. Air Force photo by staff Sgt. Ashley Hawkins/Released)