Millions of U.S. drug users now are addicted to several substances, not just opioids like fentanyl and heroin. The shift is making treatment far more difficult.
Joseph Emerson, charged with attempted murder, said he felt trapped in a dream after taking mushrooms. He had feared mental health treatments that could disrupt his career.
Many U.S. troops who fired vast numbers of artillery rounds against the Islamic State developed mysterious, life-shattering mental and physical problems. But the military struggled to understand what was wrong.