A pair of mine-resistant, ambush-protected vehicles are lined up for a convoy to Kandahar Airfield. One of the trucks broke down before leaving Forward Operating Base Frontenac. The unit has to move out 50 vehicles from the compound. Sean Carberry/NPR hide caption

itoggle caption Sean Carberry/NPR

Gen. Stanley McChrystal during a retirement ceremony in 2010. His comments in a Rolling Stone interview helped lead to his resignation. Brendan Smialowski/Getty Images hide caption

itoggle caption Brendan Smialowski/Getty Images

Students in Kabul protest violence against women in Kabul last fall. Afghan President Hamid Karzai issued a decree in 2009 protecting women's rights, but parliament has not passed a law making the decree permanent. Mohammad Ismail/Reuters/Landov hide caption

itoggle caption Mohammad Ismail/Reuters/Landov

As part of homecoming ceremonies at Joint Base Lewis-McChord in Washington state in January, Army Spc. Tyler Jeffries — with crutches and prosthetic legs — joins his unit in formation as the national anthem is played. The homecoming marked the first time Jeffries had seen his platoon since he lost both his legs in a roadside bombing in Afghanistan last October. Florangela Davila for NPR hide caption

itoggle caption Florangela Davila for NPR

Jake Tapper's new book, The Outpost, tells the story of one of America's deadliest battles during the war in Afghanistan. Little, Brown & Co. hide caption

itoggle caption Little, Brown & Co.

Former Army Staff Sgt. Clinton Romesha when he was on duty in Afghanistan. North Dakota National Guard hide caption

itoggle caption North Dakota National Guard