WASHINGTON — Army Capt. Florent Groberg left Afghanistan in 2012 with a mangled left leg that required more than 30 surgeries and confined him to a hospital bed for three months. It was the most difficult time of his life. “All you can do is sit there with your own thoughts for hours and hours and hours and hours,†he told Stars and Stripes on Monday. “You don’t sleep, you’re on drugs for the pain and things like that. “All I could think was just, ‘How?’†In Afghanistan, Groberg was charged with protecting a formation of senior leaders on Aug....