Former Air Force Senior Airman David Sharpe embraces his dog, Cheyenne, at their home in Arlington, Va., Sept. 22, 2011. Sharpe is the founder of Pets 2 Vets, a nonprofit organization that pairs shelter animals with veterans who live with post-traumatic stress disorder. Sharpe credits Cheyenne with saving his life. U.S. Air Force photo by Tech. Sgt. Mareshah Haynes Former Air Force Senior Airman David Sharpe embraces his dog, Cheyenne, at their home in Arlington, Va., Sept. 22, 2011. Sharpe is the founder of Pets 2 Vets, a nonprofit organization that pairs shelter animals with veterans who live with post-traumatic stress disorder. Sharpe credits Cheyenne with saving his life. U.S. Air Force photo by Tech. Sgt. Mareshah Haynes SHARE IMAGE: Download Image: Full Size (1.18 MB) Photo By: VIRIN: 895659-W-LUS34-630.jpg Photo Gallery