In 2007, faced with U.S. soldiers returning from Iraq and Afghanistan with traumatic brain injuries, lawmakers passed a measure requiring the military to test soldiers' brain function before they deployed and again when they returned. An investigation by ProPublica and NPR has found that the test chosen by the Department of Defense has failed to deliver on its promise, offering soldiers the appearance of help, but not the reality. Search through documents covering how the test was chosen, implemented and actually used. | Related story: Testing Program Fails Soldiers, Leaving Brain Injuries Undetected