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Associated Press
U.S. President Ronald Reagan and his wife, first lady, Nancy Reagan, meet Pope John Paul II at the Vatican on June 7, 1982.

President Barack Obama met with Pope Francis for the first time at the Vatican on Thursday, holding a nearly hourlong audience with the pontiff. The president and pope both appeared tense at the start of the meeting, but they were all smiles by the end.

Here's a gallery of photos of U.S. presidents with the head of the Catholic Church.