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His hand on the Bible from Abraham Lincoln’s inauguration, held by his wife, Michelle, Barack Obama takes the oath of office as the 44th president of the United States as he is sworn in by U.S. Supreme Court Chief Justice John Roberts (Credit: Reuters/Jim Young)

His hand on the Bible from Abraham Lincoln’s inauguration, held by his wife, Michelle, Barack Obama takes the oath of office as the 44th president of the United States as he is sworn in by U.S. Supreme Court Chief Justice John Roberts (Credit: Reuters/Jim Young)