When the U.S. began its attack on Afghanistan on Oct. 7, 2001, Nick Mendes was an 11-year-old who loved to play video games.

By the time ten years had passed, Nick Mendes had become Sgt. Mendes of the U.S. Army. In 2011, in Afghanistan’s Kandahar Province, he was blown up by an IED and paralyzed from the neck down.

“I remember ten seconds afterwards,” he recalls, “but then I blacked out.”

Afghanistan has become America’s longest war, and American troops still remain in the region years after the official 2014 end of the conflict. Sgt. Mendes, now 26, is one of more 20,000 U.S. service members injured in that war—numbers that don’t include traumatic brain injury and PTSD.