13 of 45: Ronald Reagan is sworn in as the nation's 40th president by Chief Justice of the United States Warren Burger on the west front of the Capitol in Washington, D.C., Jan. 20, 1981. Shown from left are, Reagan, Nancy Reagan, Sen. Mark Hatfield, Burger, Rosalynn Carter, outgoing President Jimmy Carter, and Joan Mondale, wife of outgoing vice president. (AP Photo) (AP Photo/ XNBG)

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