After two Army tours in Bosnia-Herzegovina in the 1990s, Marc Smith experienced signs of post-traumatic stress disorder, tinnitus and diabetes. But the heroin addiction he picked up abroad dulled his awareness of those conditions.
Mr. Smith had started using drugs "just to get out of myself" after "seeing combat, seeing bodies [and] seeing other people suffer," he said. After being honorably discharged - despite his habit, he'd "stayed out of trouble" and fulfilled his role as a sergeant - to his hometown of Newark, N.J., he lost more than 20 jobs, in addition to his license, his home, his family and his credit.