CNN Sanjay Gupta MD July 17, 2011
be a perfect training ground. >> reporter: dr. john renshaw stops to check on one of his patients. he suffered massive injuries at his job when he was caught in a conveyer belt. his cousin translates into their native haiti. renshaw is an oncologist. he treats cancer. why is he here? dr. john renshaw is major john renshaw, united states air force. he's deploying to the front lines of afghanistan to treat the war wound. but before he goes, he along with other military medical personnel will complete a tour of duty here at the university of maryland shock trauma center in baltimore. sh...