U.S. Army Sgt. 1st Class Michael Warmenhoven of Marion, Iowa, a military police platoon sergeant attached to Alpha Troop, 1st Squadron, 113th Cavalry Regiment, Task Force Red Horse, 2nd Brigade Combat Team, 34th Infantry Division, Task Force Red Bulls, takes a knee as he provides rear security for fellow soldiers while patrolling through the Bagram Security Zone, Parwan province, Afghanistan, March 12, 2011. Warmenhoven and fellow MP's patrol through the villages to ensure security.