Marines wait outside a building to take psychological tests in September 2009. The military assesses troops in search of clues that might help predict mental health issues. Jae C. Hon/AP hide caption

itoggle caption Jae C. Hon/AP

Sgt. Victor Medina suffered brain damage when an IED hit his truck in Iraq. Even after he was diagnosed with a traumatic brain injury, he found he had to fight to get adequate care. Blake Gordon/Aurora Photos hide caption

itoggle caption Blake Gordon/Aurora Photos

An honor guard consisting of members from Santa Domingo Pueblo wait to present colors at Lt. Ayon's warrior dance in 2008. Steven Clevenger hide caption

itoggle caption Steven Clevenger

Cpt. Juan Guerrero was one of 200 disabled athletes chosen to attend the 2010 Inaugural Warrior Games in Colorado Springs, Co. Katie Hayes for NPR hide caption

itoggle caption Katie Hayes for NPR