Over 100 days into the Biden administration, how is the president dealing with national security issues? Judy Woodruff explores the question with former Defense Secretary, and former CIA Director, Robert Gates. He served in both Republican and Democratic administrations, and authored "Exercise of Power: American Failures, Successes, and a New Path Forward in the Post-Cold War World." PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders