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JOINT BASE ANDREWS, MD - SEPTEMBER 22:   (AFP OUT) Pope Francis departs in a Fiat after arriving from Cuba September 22, 2015 at Joint Base Andrews, Maryland. Francis will be visiting Washington, New York City and Philadelphia during his first trip to the United States as Pope.  (Photo by Olivier Douliery-Pool/Getty Images)
JOINT BASE ANDREWS, MD - SEPTEMBER 22:   (AFP OUT) Pope Francis departs in a Fiat after arriving from Cuba September 22, 2015 at Joint Base Andrews, Maryland. Francis will be visiting Washington, New York City and Philadelphia during his first trip to the United States as Pope.  (Photo by Olivier Douliery-Pool/Getty Images)

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    Pope Francis visiting 3 U.S. cities over 6 days

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Pope Francis visiting 3 U.S. cities over 6 days

Pope Francis will speak directly to Americans for the first time as he continues his historic U.S. tour. CNN's Jim Sciutto reports.

Pope Francis visiting 3 U.S. cities over 6 days

Pope Francis will speak directly to Americans for the first time as he continues his historic U.S. tour. CNN's Jim Sciutto reports.