Members of the military listen to President Obama during his visit to Fort Bliss, Texas, on Friday. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

U.S. soldiers still patrol in Afghanistan, like this one speaking with a young man in the eastern province of Khost in August. However, Afghan forces are taking on increased responsibility as the U.S. draws down and prepares for its troops to leave by the end of 2014. Jose Cabezas/AFP/Getty Images hide caption

itoggle caption Jose Cabezas/AFP/Getty Images

An unmanned U.S. Predator drone flies over Kandahar Air Field in Afghanistan in 2010. Apple has rejected an app that tracks U.S. drone strikes around the world. Kirsty Wigglesworth/AP hide caption

itoggle caption Kirsty Wigglesworth/AP

The aftermath of a truck bomb in Kandahar, the main city in southern Afghanistan, which wounded the provincial police chief and killed two civilians Monday. Taliban attacks against Afghan officials are up sharply this year. Mamoon Durani/AP hide caption

itoggle caption Mamoon Durani/AP

Soraya Paksat of Voice of Afghan Women holds a knife that was confiscated from a woman who came to visit a young relative in one of the group's shelters. The woman intended to kill the girl for fleeing an abusive father. Sean Carberry/NPR hide caption

itoggle caption Sean Carberry/NPR

Spc. Ben Purvis (center) helps train Afghan troops on how to use mortars in the eastern province of Kunar in June. The top U.S. commander in Afghanistan, Gen. John Allen, points to several factors in the rise of "insider attacks" on American forces. He says relations between U.S. and Afghan troops are good overall. Lucas Jackson/Reuters/Landov hide caption

itoggle caption Lucas Jackson/Reuters/Landov

U.S. Marines with 1st Platoon, Company I, 3rd Battalion, 5th Marines (3/5), Regimental Combat Team 2, in Afghanistan. (January 2010 file photo.) Corporal David R. Hernandez/3rd Battalion 5th Marines-RCT 2 hide caption

itoggle caption Corporal David R. Hernandez/3rd Battalion 5th Marines-RCT 2

Many of the items in Kabul's Bush Bazaar are food and cleaning supplies that have presumably been stolen from NATO deliveries to Afghanistan. Sean Carberry/NPR hide caption

itoggle caption Sean Carberry/NPR

Aug. 13: At Dover Air Force Base in Delaware, the remains of Marine Lance Cpl. Gregory T. Buckley are carried during a dignified transfer. He was killed in a "green on blue" attack. Mark Wilson/Getty Images hide caption

itoggle caption Mark Wilson/Getty Images