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When President Donald Trump signed an executive order last month suspending the U.S. refugee program in order to implement more “extreme vetting,” PBS NewsHour viewers asked us what the current vetting process is.

On this episode for Sunday, Feb. 19, President Donald Trump is vetting the next national security adviser. Later, remembering the 75th anniversary of one of America’s most controversial executive orders that led to the internment of more than 100,000 Japanese…