Anatomy of Addiction: How Heroin and Opioids Hijack The Brain

"When Jack O'Connor was 19, he was so desperate to beat his addictions to alcohol and opioids that he took a really rash step. He joined the Marines. 'This will fix me,' O'Connor thought as he went to boot camp. 'It better fix me or I'm screwed.'"

Follow the "Source" link for the full article from NPR