Staff Sgt. Jonathan Esposito teaches Iraqi Military Police how to move in a stack.
U.S. Army Staff Sgt. Jonathan Esposito with Bravo Troop, 1st Battalion, 7th Cavalry Regiment, out of Fort Hood, Texas, teaches Iraqi Military Police how to move in a stack at Joint Security Station Istiqlaal, in Baghdad, Iraq, on Sept. 14, 2009.