EVB2923733: Jacqueline Kennedy as she leaves New England Baptist Hospital, 1955 (b/w photo) / Bridgeman Images

EVB2923748: Captain Earl Yates (on right, saluting), the commanding officer of the new aircraft carrier USS John F. Kennedy during the commissioning ceremonies. Kennedy's widow Jacqueline and children, Caroline and John Jr. look on. Also Attending were Patricia Kennedy Lawford (back row) and Joan Kennedy (far right). August 7, 1968 / Bridgeman Images

EVB2922888: 1968 Presidential third party hopefuls / Bridgeman Images

EVB2922961: Franklin D. Roosevelt (left) was assistant secretary of the navy, under Josephus Daniels (center), 1919 / Bridgeman Images

EVB2923048: President Jimmy Carter. Oct. 1977 / Bridgeman Images

EVB2923060: Republican Presidential candidate Ronald Reagan, getting into the saddle. July 1980 / Bridgeman Images

EVB2923069: President Nixon, enjoys a laugh with his Chinese guides as he mingles with a crowd outside the Forbidden City in Beijing. Feb. 25, 1972 / Bridgeman Images

EVB2922975: Dec. 21, 1933. Franklin Roosevelt with his Cabinet. At head of table is FDR seated at his desk in the White House, Dec. 21, 1933 / Bridgeman Images

EVB2923084: Former Vice Pres. Richard Nixon leaving New York for fact finding trip to the Near East and Afric, 1967 / Bridgeman Images

EVB2923087: Presidential candidate Richard Nixon at a rally attended by 19,000 in New York's Madison Square Garden. Oct. 31, 1968 / Bridgeman Images

EVB2923052: Georgia Governor Jimmy Carter, talking on the telephone during his Democratic Primary campaign. April 12, 1976 / Bridgeman Images

EVB2922984: President Franklin and Eleanor Roosevelt welcome the Mexican Minister of Finance (center), Alberto Pani, to discuss world economic problems, May 11, 1933 / Bridgeman Images

EVB2922993: Governor Franklin Roosevelt on the back of his 1932 campaign train at Bellefontaine, Ohio, 13, 1932. / Bridgeman Images

EVB2923109: President Richard Nixon with George Shultz, director of the Office of Management and Budget. Nixon discussed organized labor's agreement to co-operate with his Phase II economic controls. Oct. 12, 1971 / Bridgeman Images

EVB2923110: President Richard Nixon with Melvin Laird, Secy of Defense, Sept. 19, 1969 / Bridgeman Images

EVB2923133: President Richard Nixon meets young people who have served on experimental youth advisory committees within the Selective Service System, June 6, 1969 / Bridgeman Images

EVB2923128: President Richard Nixon and Governor Nelson Rockefeller discussed the governor’s gloomy assessment of Latin American relations, Nov. 10, 1969 / Bridgeman Images

EVB2923300: Crowd at the Inauguration of Richard Nixon. President Nixon is at the podium. Jan 20, 1969 / Bridgeman Images

EVB2923164: Republican Convention delegates wait to shake the hand of President Richard Nixon after his acceptance speech. Aug. 23, 1972 / Bridgeman Images

EVB2923357: Lady Bird Johnson and Muriel Humphrey at the annual First Lady Breakfast of the Congressional Club. May 5, 1966 / Bridgeman Images

EVB2923188: Vice President Richard Nixon golfing, May 23, 1953. / Bridgeman Images

EVB2923194: President Richard Nixon in his office at the White House studying background material for his upcoming European trip. Feb. 2, 1969 / Bridgeman Images

EVB2923200: President Richard Nixon listens to an animated John Connally, Treasury Secy, as he embarks on his historic trip to China, Feb. 17, 1972 / Bridgeman Images

EVB2923218: President Richard Nixon and Ferdinand Marcos during motorcade to Malacanang Palace in Manila, July 26, 1969 / Bridgeman Images

EVB2923221: President Richard Nixon and President Nicolae Ceausescu ride through Bucharest, Romania, August 2, 1969 / Bridgeman Images

EVB2923242: Richard Nixon with his dog King Timahoe, Feb. 3, 1969 (b/w photo) / Bridgeman Images

EVB2923254: President Richard Nixon dances with the First Lady at Tricia's wedding reception, June 12, 1971 / Bridgeman Images

EVB2923284: Hannah Milhaus at the age of 10. The mother of President Richard Nixon grew up in a Quaker family. 1905 / Bridgeman Images

EVB2923441: Joseph P. Kennedy funeral. Rose Kennedy leaving St. Francis Xavier Church in Hyannis following private funeral service for her husband, Joseph P. Kennedy. She is escorted by her son, Senator Edward Kennedy. Nov. 20, 1969 / Bridgeman Images

EVB2923305: 'Counter-Inaugural' staged by protesters at Richard Nixon's 1969 Inauguration. For the first time in the Nation's history, a Presidential inauguration was confronted by a large-scale demonstration. Jan. 19, 1969 / Bridgeman Images

EVB2923453: Nomadic tents can be seen in a mountainous area outside of Kabul, Afghanistan. Sept. 17, 1971 / Bridgeman Images

EVB2923546: Closing time on the trading floor of the New York Stock Exchange on March 11, 1976. The Dow Jones Industrial Average crossed the ,000 mark twice during the day, but fell back both times, ending the day at .70, up 4.96 points / Bridgeman Images

EVB2923488: African American flood refugees vaccinated for typhoid at Camp Louisiana, near Vicksburg. Many would have joined the 'Great Migration' to northern cities, but authorities isolated them in unhealthy camps until the flood subsided, hence preserving their low paid agricultural workforce. May 21, 1927 / Bridgeman Images

EVB2923564: Harlem's famous thoroughfare, 125th street in 1943 / Bridgeman Images

EVB2923466: Einstein's Four Equations, 1947 (print) / Bridgeman Images

EVB2923509: The first Social Security checks are mailed. Guy Allen, an officer of the Treasury Department (wearing jacket) supervises the mailing by the Post Office of thousands of old age insurance checks. Jan. 1, 1940 / Bridgeman Images