  | 
			U.S. Army Spc. Patrick Chittock, left, and Sgt. Salvador Gutierrez 
			navigate through the obstacle course during the Pre-Ranger Course on 
			Fort Irwin, Calif., May 18, 2009. Chittock 
			is assigned to Headquarters and Headquarters Troop, and Gutierrez is 
			assigned to F Troop, 2nd Squadron, 11th Armored Cavalry Regiment. 
			U.S. Army photo by 
			Spc. Nathaniel Muth  |