O'Brien has been working in the State Department as the administration's hostage negotiator. He'll replace former Ambassador John Bolton, who parted company with Trump.
Mitchell, the chief foreign affairs correspondent for NBC News and anchor of her own MSNBC show, looks back on her career in journalism. She's receiving a lifetime achievement Emmy on Sept. 24.
Mike Folmer, 63, was arrested at his home on Tuesday. According to court documents, he told police that he "had been dealing with some personal problems."
This season, baseball stadium chefs have gotten creative with over-the-top hot dogs and brats. At Phoenix's Chase Field, fans can try them topped with everything from tater tots to mac and cheese.