KNOXVILLE, Tenn. (AP) - Air Force coach Fisher DeBerry gambled against No. 11 Tennessee and ended up with one of the biggest disappointments of his long career. The Falcons (0-1) frustrated the Volunteers' defense with their tricky triple-option offense and staged a comeback in the final minutes to pull to within one on a touchdown with 1:35 remaining. DeBerry chose to go for the lead instead of a tie. Tennessee's Xavier Mitchell stuffed the late 2-point conversion try and preserved the 31-30 victory Saturday. "I think they came in here to win the game," Tennessee coach Phillip Fulmer said. "It was their call. If they made it, they would have been heroes."