TWO LIFESAVERS 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. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 240128-A-QTX69-044.jpg Photo Gallery