In the shadows of Washington's government office buildings, Gary Hayes searches for another dose of heroin, chasing a high that will last only a few hours before he wants more. "It's hard to stop using when you are living on the streets and there's no treatment help," Hayes told VOA. The 28-year-old Black man, who lives in a homeless tent encampment in the nation's capital, has struggled with substance abuse disorder for a decade. "I overdosed twice in the last year, but I know several people who died," Hayes said, reflecting on the deadly opioid epidemic playing out during another health tragedy, the coronavirus pandemic. More than 93,000 Americans died from drug overdoses in 2020, the highest number on record, according to Centers for Disease Control and Prevention (CDC) statistics…