Why North Korea's most recent missile tests are worrying U.S. officials

Over the weekend, North Korea tested a missile that flew so far that it could have reached the U.S. territory of Guam in the South Pacific. It is North Korea’s longest-range test since 2017, and seventh such test this month -- the most launched so closely together in the 10 years of leader Kim Jong Un’s rule. Nick Schifrin reports.

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North KoreaNorth Korean missileNorth Korea arms race