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WASHINGTON, DC - SEPTEMBER 24: Pope Francis addresses a joint meeting of the U.S. Congress with with Vice President Joe Biden (L) and Speaker of the House John Boehner (R-OH) in the House Chamber of the U.S. Capitol on September 24, 2015 in Washington, DC. Pope Francis is the first pope to address a joint meeting of Congress and will finish his tour of Washington later today before traveling to New York City. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - SEPTEMBER 24:  Pope Francis addresses a joint meeting of the U.S. Congress with with Vice President Joe Biden (L) and Speaker of the House John Boehner (R-OH) in the House Chamber of the U.S. Capitol on September 24, 2015 in Washington, DC.  Pope Francis is the first pope to address a joint meeting of Congress and will finish his tour of Washington later today before traveling to New York City.  (Photo by Mark Wilson/Getty Images)