Michael Ferrara with his German shepherd, Lhotse, at the top of Colorado's Independence Pass Paolo Marchesi/Outside hide caption

itoggle caption Paolo Marchesi/Outside

A U.S. soldier is brought to the emergency room at the U.S. hospital at Bagram Air Field, north of Kabul, after he was wounded by a roadside bomb in Wardak province, June 2009. The facility uses both cutting-edge technology as well as old techniques discovered anew to treat the massive number of wounded soldiers who pass through. Rafiq Maqbool/AP hide caption

itoggle caption Rafiq Maqbool/AP

The definitions for some mental disorders may change in the new edition of the DSM. Mark Strozier/iStockphoto.com hide caption

itoggle caption Mark Strozier/iStockphoto.com