U.S. Marine Corps Gen. James Amos testifies on Capitol Hill in September. Amos, now the Marine Corps' top officer, told Congress earlier this month that "don't ask, don't tell" should remain the law of the land. Alex Brandon/AP hide caption

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An Afghan policeman receives weapons training from U.S. soldiers on the outskirts of Afghanistan's Kandahar City last month. Rodrigo Abd/AP hide caption

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Col. Muhammed Rasoud Qandahari, one of the top Afghan army officers in the Kandahar region, speaks with a young man outside a shura, or community meeting, in Panjwaii, west of Kandahar. U.S. troops are hoping to clear the area of Taliban and let Afghan troops take over. Greg Dixon/NPR hide caption

itoggle caption Greg Dixon/NPR

Soldiers from Chaos Company, 101st Airborne Division, destroy a building in Kandahar. Troops from Headquarters Company recently entered the abandoned Kandahar village of Haji Abdu Rauf to destroy anything useful so the Taliban don't use it as a safe haven. Massoud Hossaini/AFP/Getty Images hide caption

itoggle caption Massoud Hossaini/AFP/Getty Images

President Obama and Gen. Stanley McChrystal in the Oval Office on May 19, 2009. McChrystal's firing this summer following his comments in a magazine interview prompted soul-searching within the military. Pete Souza/The White House/Getty Images hide caption

itoggle caption Pete Souza/The White House/Getty Images