United States Army

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US Army soldiers of the 1st Battalion 320th Alpha Battery, 2nd Brigade of the 101st Airborne Division, search for insurgents from a rooftop firing position at Combat Outpost Nolen, in the volatile Arghandab Valley, in Kandahar, Afghanistan, Thursday, July 22, 2010. (AP Photo/Rodrigo Abd)

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U.S. Army troops from the 1st Battalion 320th Alpha Battery, 2nd Brigade of the 101st Airborne Division, duck as an Afghan soldier fires a rocket propelled grenade towards insurgent positions at Combat Outpost Nolen, in the volatile Arghandab Valley, in Kandahar, Afghanistan, Thursday, July 22, 2010. (AP Photo/Rodrigo Abd)

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A U.S. Army soldier of the 1st Battalion 320th Alpha Battery, 2nd Brigade of the 101st Airborne Division, clears undergrowth to lay protective razor wire outside the walls of Combat Outpost Nolen, in the volatile Arghandab Valley, in Kandahar, Afghanistan, Thursday, July 22, 2010. (AP Photo/Rodrigo Abd)

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U.S. Army soldiers of the 1st Battalion 320th Alpha Battery, 2nd Brigade of the 101st Airborne Division, lay razor wire outside the walls of Combat Outpost Nolen, in the volatile Arghandab Valley, in Kandahar, Afghanistan, Thursday, July 22, 2010. (AP Photo/Rodrigo Abd)

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U.S. Army soldiers of the 1st Battalion 320th Alpha Battery, 2nd Brigade of the 101st Airborne Division, relax after a morning exercise session at Combat Outpost Nolen, in the volatile Arghandab Valley, in Kandahar, Afghanistan, Thursday, July 22, 2010. (AP Photo/Rodrigo Abd)

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U.S. Army 1st Lt. Christopher Babcock, from New Orleans, La., photographs an Afghan villager for intelligence purposes after he was stopped cycling near COP Nolen, in the volatile Arghandab Valley, Kandahar, Afghanistan, Thursday, July 22, 2010. (AP Photo/Rodrigo Abd)

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An Afghan villager describes how insurgents disguise themselves as he speaks with U.S. Army 1st Lt. Christopher Babcock, from New Orleans, La., at COP Nolen, in the volatile Arghandab Valley, Kandahar, Afghanistan, Thursday, July 22, 2010. (AP Photo/Rodrigo Abd)

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Iraq's Minister of Justice Dara Noureddin, left, and U.S. Army Maj. Gen. Jerry Cannon, right, sign documents handing the U.S. Theater Internment Facility at Camp Cropper to Iraqi control at a ceremony, Thursday, July 15, 2010 in Baghdad. (AP Photo/Maya Alleruzzo)

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A U.N. Command soldier keeps a watchful eye on a North Korean soldier peering in through a window as U.S. Army Col. Kurt Taylor briefs Secretary of State Hillary Rodham Clinton and Defense Secretary Robert M. Gates on Wednesday. (Associated Press)

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U.S. Army Col. Kurt Taylor, right, briefs Secretary of State Hillary Rodham Clinton, center, and Secretary of Defense Robert Gates, 2nd right, as a curious North Korean soldier looks through a window at the truce village of Panmunjom in the demilitarized zone that separates the two Koreas since the Korean War, north of Seoul, South Korea, Wednesday, July 21, 2010. (AP Photo/Paul J. Richards, Pool)

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U.S. Army Col. Kurt Taylor, right, briefs Secretary of State Hillary Rodham Clinton, center, and Secretary of Defense Robert Gates, 2nd right, as a curious North Korean soldier looks through the window at the truce village of Panmunjom in the demilitarized zone that separates the two Koreas since the Korean War, north of Seoul, South Korea, Wednesday, July 21, 2010. (AP Photo/Paul J. Richards, Pool)

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A U.S. Army soldier from the 1-320th Alpha Battery, 2nd Brigade of the 101st Airborne Division points his rifle during a patrol towards COB Nolan, in the volatile Arghandab Valley, Kandahar, Afghanistan, Tuesday, July 20, 2010. (AP Photo/Rodrigo Abd)

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A U.S. Army soldier from the 1-320th Alpha Battery, 2nd Brigade of the 101st Airborne Division searches an Afghan villager during a foot patrol towards COB Nolan, in the volatile Arghandab Valley, Kandahar, Afghanistan, Tuesday, July 20, 2010. (AP Photo/Rodrigo Abd)

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U.S. Army soldiers from the 1-320th Alpha Battery, 2nd Brigade of the 101st Airborne Division, climb over a mud wall during a patrol towards COB Nolan, in the volatile Arghandab Valley, Kandahar, Afghanistan, Tuesday, July 20, 2010. (AP Photo/Rodrigo Abd)

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** FILE ** U.S. Army Gen. David H. Petraeus (left) meeting with Gen. Ashfaq Parvez Kayani, the Pakistani army chief, in Rawalpindi, Pakistan, on Monday, July 12, 2010. (AP Photo/Inter Services Public Relations Department)

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A U.S. Army soldier from Bravo Company, 2nd Battalion of the 508 Parachute Infantry Regiment of the 82nd Airborne, climbs over a high wall during a patrol in the volatile Arghandab Valley outside Kandahar City, Afghanistan, on Saturday, July 10, 2010. (AP Photo/Kevin Frayer)

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In this photo taken Thursday, July 8, 2010, Afghan soldiers pause during a patrol with United States Army soldiers from Bravo Company, 2nd Battalion of the 508 Parachute Infantry Regiment of the 82nd Airborne, in the volatile Arghandab Valley, outside Kandahar City. (AP Photo/Kevin Frayer)

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U.S. Army Gen. Raymond T. Odierno speaks during a press conference in Baghdad on Tuesday, July 6, 2010. (AP Photo/Karim Kadim)

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**FILE** In this May 8, 2010, file photo, U.S. Army soldiers with 2nd Platoon, Alpha Company, 2nd Battalion, 1st Infantry Regiment of the 5th Stryker Brigade, keep their eyes in the direction of two Taliban fighters, armed with AK-47 assault rifles, who were seen running after one soldier shot at them when they entered the nearby intersection in Afghanistan's Kandahar province. (Associated Press)