U.S. Marines in action.

Corporal Hunter Woolf (R) with his dog Susie, US Marine of the 2nd Batallion, 1st Marines Weapons Company checks the situation during a patrol in Laki, Garmser, Helmand Province Afghanistan on March 4, 2011. There are around 140,000 international troops, two-thirds of them from the United States in Afghanistan fighting the militant Islamist Taliban. (AFP PHOTO / ADEK BERRY)

A US Marine of the 2nd Battallion, 1st Marines Weapons Company returns to a base after a joint patrol with Afghanistan National Army (ANA) soldiers in Laki downsouth Garmser, Helmand Province, Afghanistan on March 3, 2011. (AFP PHOTO / ADEK BERRY)

Corporal Hurb Hartfield (R), US Marine of the 2nd Battalion, 1st Marines Weapons Company checks situation during a patrol with Afghanistan National Army (ANA) soldiers in Laki south Garmser, Helmand Province, Afghanistan on March 3, 2011. (AFP PHOTO / ADEK BERRY)

A US Marine of the 2nd Batallion, 1st Marines Weapons Company walks on a joint patrol with Afghanistan National Army (ANA) soldiers in Laki south Garmser, Helmand Province, Afghanistan on March 2, 2011. (AFP PHOTO / ADEK BERRY)

A US Marine of the 2nd Batallion, 1st Marines Weapons Company asks a farmer about his poppy crop during a patrol along with Afghanistan National Army (ANA) soldiers in Laki, Garmser, Helmand Province, Afghanistan on March 2, 2011. (AFP PHOTO/ADEK BERRY)

US Marines of the 2nd Battallion, 1st Marines Weapons Company take position as others check Afghan men at the check point (unseen) during a patrol with Afghanistan National Army (ANA) soldiers in Laki downsouth Garmser, Helmand Province, Afghanistan on March 3, 2011. (AFP PHOTO / ADEK BERRY)

A US Marine of the 2nd Batallion, 1st Marines Weapons Company pushes an Afghan child on a swing at a playground of a school managed by The Marines in Laki, Garmser, Helmand Province Afghanistan on March 4, 2011. There are around 140,000 international troops, two-thirds of them from the United States in Afghanistan fighting the militant Islamist Taliban. (AFP PHOTO/ADEK BERRY)

US Marines of the 2nd Batallion, 1st Marines Weapons company stand guard during a patrol in Laki, Garmser, Helmand Province Afghanistan on March 4, 2011. There are around 140,000 international troops, two-thirds of them from the United States in Afghanistan fighting the militant Islamist Taliban. (AFP PHOTO/ADEK BERRY)

US Marines of the 2nd Batallion, 1st Marines Regiment during a patrol in Garmser, Helmand Province, Afghanistan on March 1, 2011. There are around 140,000 international troops, two-thirds of them from the United States in Afghanistan fighting the militant Islamist Taliban. (AFP PHOTO / ADEK BERRY)

US Marine Corporal Hunter Woolf of the 2nd Batallion, 1st Marines Weapons Company checks the situation during a patrol in Laki, Garmser, Helmand Province Afghanistan on March 4, 2011. (AFP PHOTO/ADEK BERRY)