In this Dec. 21, 2016 photo provided by the United Nations, U.N. Secretary-General Ban Ki-moon rubs the nose on the statue of former U.S. President Abraham Lincoln during a visit to Abraham Lincoln Presidential Library and Museum in Springfield, Ill. "Lincoln was a heroic force for equality, integration and reconciliation; and desperately, we need that spirit today," Ban said of the U.S. leader during America's Civil War. (Amanda Voisard/The United Nations via AP)