NPR News covers the U.S. imposing 50% tariffs on Canadian goods, sparking last-minute trade talks. South Korea strengthens military capabilities after Trump downsizes joint drills with North Korea. Record-low water levels in Lake Powell threaten power and supplies for millions. CDC data reveals a record rise in non-medical vaccine exemptions among kindergartners. Additionally, Rep. Jimmy Gomez faces an ethics probe for sexual misconduct, and Amazon reinstates arbitration clauses to block class-action lawsuits.