Josh Apsey, then an 18-year-old lance corporal, bumps fists with his dad through a bus window as he begins his trip to Afghanistan in 2009. Apsey is still in the Marines, serving in Virginia, and says the war in Afghanistan made him a different person. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR

Drone pilots fight a war from the safety of bases in the U.S. but confront some of the same wartime stresses as their comrades on the battlefield. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

Relatives comfort an Afghan man outside a Kabul hospital where victims of Tuesday's suicide bombing were taken. A suicide bomber struck a crowd of Shiite worshippers marking a holy day in the Afghan capital. Ahmad Jamshid/AP hide caption

itoggle caption Ahmad Jamshid/AP

A U.S. marine watches a statue of Saddam Hussein being toppled in Firdaus Square, in downtown Baghdad, on April 9, 2003. Jerome Delay /AP hide caption

itoggle caption Jerome Delay /AP

Sen. Sherrod Brown, D-Ohio, speaks on Capitol Hill about the Hire Heroes Act, which gives tax breaks to businesses that hire unemployed veterans. Vets that have served since 2001 face a higher unemployment rate than the population overall. Brendan Smialowski/Getty Images hide caption

itoggle caption Brendan Smialowski/Getty Images