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https://ondemand.npr.org/anon.npr-mp3/npr/me/2019/09/20190919_me_trump_picks_robert_obrien_to_replace_john_bolton_as_national_security_advisor.mp3?orgId=1&topicId=1122&d=360&p=3&story=762212398&ft=nprml&f=1003,1004,1007,1013,1014,1015,1017,1024,1025,1026,1059,1122,1150
David Greene talks with Juan Zarate, a former deputy national security adviser, about President Trump's new national security adviser Robert O'Brien, who takes over for John Bolton.
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