U.S. first lady Melania Trump presided over a U.N. Security Council meeting on Monday focusing on children in conflict, one of her signature issues, and acknowledged she was doing so in "challenging times" as the United States has joined Israel in attacking Iran. Hanging over Monday's meeting was what Iranian state media says was an airstrike that hit a girls' school in southern Iran, killing at least 165 people and wounding dozens more. The Israeli military said it was not aware of strikes in the area. The U.S. military said it was looking into the reports. ... Shortly before Monday's...