Just after the United States invaded Iraq in 2003, Mike Rials was on track to graduate from Richardson’s J. J. Pearce High School and start his freshman year at Texas Tech. But at the last minute, Rials decided he wanted a bigger challenge: He enlisted... traumatic brain injury, the two signature wounds of the wars in Iraq and Afghanistan. That adjustment can be even more difficult when the veteran goes from the battlefield to the classroom. “When they come off the battlefield, where they’ve had to be...