A column of Stryker armored vehicles carrying troops with the 4th Brigade, 2nd Infantry Division, crosses the border from Iraq into Kuwait on Wednesday. Maya Alleruzzo/AP hide caption

itoggle caption Maya Alleruzzo/AP

Iraqi Prime Minister Nouri al-Maliki speaks during a joint news conference Aug. 8 in the northern Iraqi city of Irbil. Maliki has the backing of both Washington and Tehran to hold on to his job, six months after an election in which his party narrowly lost. Safin Hamed/AFP/Getty Images hide caption

itoggle caption Safin Hamed/AFP/Getty Images

Awakening militiamen, former Sunni rebels who sided with U.S. soldiers against al-Qaida during Iraq's brutal insurgency, man a checkpoint in the northern city of Samarra on Aug. 21. The future of the Awakening is uncertain: They feel under threat as the U.S. withdraws its troops; many fear reprisals lie ahead. Mahmud Saleh/AFP/Getty Images hide caption

itoggle caption Mahmud Saleh/AFP/Getty Images

A new report says the biggest threat against the U.S. now comes in the form of homegrown terrorists. But in many ways, trying to catch homegrown terrorists is more complicated: The suspect could now be an MBA from Connecticut -- like Times Square attempted bomber Faisal Shahzad (above) -- or a college student from Minneapolis. AP/Orkut.com hide caption

itoggle caption AP/Orkut.com

Sgt. Derrick Junge was diagnosed with a concussion, but passed over for a Purple Heart. Junge has not received rehabilitation or treatment for ongoing medical difficulties, and he struggles with simple tasks. NPR/Frontline hide caption

itoggle caption NPR/Frontline