Three Afghan men on a motorcycle passed by as U.S. Marines patrolled last month in Afghanistan's Helmand Province. Adek Berry /AFP/Getty Images hide caption

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Last week in Jalalabad, Afghanistan, suicide bombers rushed into a bank building. Forty people died in the explosion and from point-blank shots fired by the attackers. /AP hide caption

itoggle caption /AP

Lt. Gen. William B. Caldwell takes Sen. Lisa Murkowski on a tour of a Kabul training facility, Jan. 9, 2010. The general has been accused of using psychological profiles to influence American visitors to Afghanistan. US Navy/Francis J. Carroll hide caption

itoggle caption US Navy/Francis J. Carroll

October 2009 file photo: U.S. Army Specialist Damyon Miller from the 3rd Platoon, Charlie Company, 1st Infantry Regiment, 5th Stryker Brigade Combat Team, 2nd Infantry Division, mans a machine gun mounted at the back of a Stryker vehicle as the large armored convoy patrols near the Afghanistan and Pakistan border. Romeo Gacad /AFP/Getty Images hide caption

itoggle caption Romeo Gacad /AFP/Getty Images