U.S. Army Staff Sgt. Lorenzo Johnson examines his Global Positioning System receiver during a route reconnaissance patrol of Alternate Supply Route Boston in Iraq, on May 6, 2005. Soldiers of Bravo Company, 2nd Battalion, 112th Armor, 56th Brigade Combat Team, 36th Infantry Division, are patrolling Route Boston and Main Supply Route Michigan to inspect any potholes or suspicious landmarks where improvised explosive devices could be concealed.