LOS ANGELES, CA - NOVEMBER 16: Chevrolet Camaro ZL1 convertible is unveiled at the LA Auto Show on November 16, 2011 in Los Angeles, California. The car show opens to the public on Friday and runs through November 27. (Photo by Kevork Djansezian/Getty Images)

U.S. Marine Alex Minsky lost his leg and nearly died in Afghanistan three years ago, when he and his fellow Marines fell victim to a roadside bomb. After recovering from a coma and learning to use his new prosthetic leg, the Purple Heart recipient fell into depression and started drinking.