NPR News Now covers the start of mail-in voting in North Carolina and Wisconsin, highlighting voter concerns over potential Supreme Court rulings on USPS ballot delivery. The report details escalating US-Iran tensions, with the UN Security Council addressing Iran’s nuclear non-cooperation and oil prices surging past $100 a barrel. Additionally, the House Oversight Committee recommends new Pentagon programs to address brain injuries and mental health risks among naval aviators. The episode also previews the New Hampshire Senate race between John Sununu and Chris Pappas and announces the upco…