PBS NewsHour White House correspondent, Yamiche Alcindor, responds to new reporting from the book "Peril," which states that Chairman of the Joint Chiefs of Staff Mark Milley acted to prevent then-President Trump from misusing the U.S. nuclear arsenal during the final month of his time in office. She shares what officials are telling her about the news. » Subscribe to MSNBC: http://on.msnbc.com/SubscribeTomsnbc About: MSNBC is the premier destination for in-depth analysis of daily headlines, insightful political commentary and informed perspectives. Reaching more than 95 million households worldwide, MSNBC offers a full schedule of live news coverage, political opinions and award-winning documentary programming -- 24 hours a day, 7 days a week. Connect with MSNBC Online Visit msnbc.com: http://on.msnbc.com/Readmsnbc Subscribe to MSNBC Newsletter: MSNBC.com/NewslettersYouTube Find MSNBC on Facebook: http://on.msnbc.com/Likemsnbc Follow MSNBC on Twitter: http://on.msnbc.com/Followmsnbc Follow MSNBC on Instagram: http://on.msnbc.com/Instamsnbc Yamiche Alcindor Shares Reporting On Milley Acting To Prevent Trump From Misusing Nuclear Arsenal