Major Garrett talks North Korea and his new book

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President Trump hailed the summit between North and South Korean leaders today writing on Twitter that the decision of North Korea to dismantle their nuclear test site is very exciting. Major Garrett, CBS News Chief White House Correspondent, joins Craig Melvin to discuss US relations with North Korea and his new book, "Mr. Trump's Wild Ride. The thrills, chills, screams and occasional blackouts of his extraordinary first year."