NPR News covers the U.S. imposing 50% tariffs on Canadian goods, prompting last-minute trade talks. In Asia, South Korea seeks to boost military capabilities after Trump scaled back joint drills with North Korea. Domestically, record-low water levels threaten Lake Powell’s power generation, while CDC data reveals a rise in non-medical vaccine exemptions. Additionally, Rep. Jimmy Gomez faces an ethics probe, and Amazon reinstates arbitration clauses to block class-action lawsuits.