EVB2947734: President Barack Obama waves to the audience after speaking at Symphony Hall, Boston. June 25, 2012 / Bridgeman Images

EVB2947753: President Barack Obama presents a gift to King Bhumibol Adulyadej of Thailand. The gift was a photo album containing photos of the King with U.S. Presidents and First Ladies dating back to President Eisenhower. At left are U.S. Ambassador Kristie Kenney with Secretary of State Hillary Rodham Clinton. Bangkok, Thailand, Nov. 18, 2012 / Bridgeman Images

EVB2947755: President Barack Obama and Thai Prime Minister Yingluck Shinawatra greets young performers. Government House in Bangkok, Thailand, Nov. 18, 2012 / Bridgeman Images

EVB2947756: President Barack Obama talks with Thai Prime Minister Yingluck Shinawatra. Government House in Bangkok, Thailand, Nov. 18, 2012 / Bridgeman Images

EVB2947757: Audience cheers as President Barack Obama delivers remarks on the American Jobs Act. Manchester, N.H., Nov. 22, 2011 / Bridgeman Images

EVB2947766: President Barack Obama, lays a wreath at the Grave of the Unknown Warrior at Westminster Abbey. London, England, May 24, 2011 / Bridgeman Images

EVB2947770: President Barack Obama speaks to members of both Houses of Parliament at Westminster Hall. London, England, May 25, 2011 / Bridgeman Images

EVB2947785: First Lady Michelle Obama during the Kids' State Dinner in the East Room of the White House. They watch a performance of 'Big Time Rush'. Aug. 20, 2012 / Bridgeman Images

EVB2947786: First Lady Michelle Obama greets children at Naval Air Station Oceana Summer Camp. Virginia Beach, Va., July 21, 2011 / Bridgeman Images

EVB2947789: President Barack Obama and his family walk to attend an Easter service at St. John's Church. Washington, D.C., March 31, 2013 / Bridgeman Images

EVB2947794: President Barack Obama talks with advisors in the Oval Office, April 4, 2011 / Bridgeman Images

EVB2947796: Bo, the Obama family dog, on the North Lawn of the White House, Sept. 28, 2012 / Bridgeman Images

EVB2947798: President Barack Obama plays with Bo, aboard Air Force One during a flight to Hawaii. Dec. 23, 2011 / Bridgeman Images

EVB2947804: President Barack and Michelle Obama dance at the Commander in Chief Inaugural Ball. Jan 21, 2013. The First Lady's red evening gown was designed by Jason Wu / Bridgeman Images

EVB2947818: Commemoration ceremony at the National September 11 Memorial in New York City. President Barack and Michelle Obama, with former President George W. and Laura Bush, greet victims' family members and local dignitaries. Sept. 11, 2011 / Bridgeman Images

EVB2947821: President and First Lady hosted a ceremony to unveil the Bushes' official portraits. President Barack and Michelle Obama, walk with former President George W. and Laura Bush in the Cross Hall towards the East Room of the White House, May 31, 2012 / Bridgeman Images

EVB2947822: President Barack Obama and First Lady Michelle Obama host a lunch for the Bush family. May 31, 2012 (photo) / Bridgeman Images

EVB2947825: Gene Sperling, Economic Council Director talks with Sec. of State Hillary Clinton and Jack Lew. Behind them from left: U.S. Ambassador to China, Gary Locke; Kurt Campbell, Asst. Sec. of State for East Asia; Mike Froman, Dep. Natl. Security Advisor for International Economics; and Lael Brainard, Under Sec. of the Treasury for International Affairs. They are all standing by as President Barack Obama has a meeting with President Xi Jinping of China. Feb. 14, 2012 / Bridgeman Images

EVB2947394: Alan Greenspan testifying before a joint House-Senate Economic Committee, Jan. 6, 1975. Greenspan was then Chairman of the Council of Economic Advisers. / Bridgeman Images

EVB2947411: Patty Berg playing golf in 1951. She was a founding member and player on the LPGA Tour. She won 15 major titles from 1940 to 1962. / Bridgeman Images

EVB2947419: Letitia Baldrige in her White House office as Jacqueline Kennedy's Social Secretary. She was an etiquette expert, public relations executive, and author. Jan. 25, 1961. / Bridgeman Images

EVB2947425: Jacqueline Kennedy having a 'bindi' placed on her forehead at Jaipur, India. A bindi is a red dot on the forehead which is a sign of marriage. / Bridgeman Images

EVB2947429: Pierre Salinger, President Kennedy's Press Secretary in his White House office. Jan. 25, 1961. / Bridgeman Images

EVB2947433: Reverend Billy Graham and President John Kennedy seated at a Prayer Breakfast. It was sponsored by the International Council for Christian Leadership. Feb.9, 1961. / Bridgeman Images

EVB2947436: Guests talk and mingle before the Inauguration ceremony of President John Kennedy. Jacqueline Kennedy talks with Lady Bird Johnson as they await arrival of President-elect John F. Kennedy and Vice President-elect Lyndon B. Johnson. Behind them: John F. Kennedy's sister Eunice Kennedy Shriver; her husband R. Sargent Shriver; and Attorney General-designate Robert F. Kennedy. Jan. 20, 1961. / Bridgeman Images

EVB2947440: President John Kennedy and First Lady Jacqueline Kennedy in lead car of the Inaugural Parade. The parade stretches up Pennsylvania Avenue to the distant Capitol. Jan. 20, 1961. / Bridgeman Images

EVB2947442: President John Kennedy and Vice President Lyndon Johnson. They were hosting a Legislative Leaders Breakfast Meeting in the Oval Office. Feb. 7, 1961., Unknown photographer, (20th century) / Bridgeman Images

EVB2947444: President Kennedy shaking hands with Llewellyn Thompson, U.S. Ambassador to Russia. Feb. 24, 1961 (b/w photo), Unknown photographer, (20th century) / Bridgeman Images

EVB2947449: Mamie Eisenhower and Jacqueline Kennedy after the future First Lady's tour of the White House. Mrs. Kennedy first impressions led to her signature project, an ambitious historical restoration of the White House interiors., Unknown photographer, (20th century) / Bridgeman Images

EVB2947463: Local United Mine Workers Union meeting on Sunday morning in a schoolhouse. Sept 22, 1946. The men worked at the Inland Steel Company's mines in Wheelwright, Kentucky. One of the Union leaders is an African American. / Bridgeman Images

EVB2947510: Boris Morros posing with Ginger Rogers at the Harwyn Club in NYC, Nov. 13, 1957. Morros, a Hollywood producer, was spied for the Soviets during World War 2, and became a double agent for the FBI in 1947. Morros was the co-author of the screenplay for the 1960 film, MAN ON A STRING, starring Ernest Borgnine and based on Morros espionage experiences. / Bridgeman Images

EVB2947294: Whittaker Chambers, named of Alger Hiss as a fellow Communist the 1930s during his HUAC testimony in August 3, 1948. When Hiss filed a ,000 libel suit against Chambers on October 8, 1948, Chambers produced documents that supported his accusation. With the evidence, Hiss was indicted for perjury for testimony he had given before a federal grand jury in Dec. 1948. / Bridgeman Images

EVB2947331: Winston Churchill with King George VI, May 8, 1948. They are in the garden of Buckingham Palace during the celebration of Victory in Europe. / Bridgeman Images

EVB2947336: Winston Churchill at Blenheim Palace speaking to a crowd of 60,000. The former Prime Minister decried the Labour socialist government, declaring that socialism was a calamity second only to the recent World War 2. August 5, 1947. / Bridgeman Images

EVB2947337: Former Premier Winston Churchill broadcasting a radio message during the British general elections. Aug. 16, 1947. / Bridgeman Images

EVB2947343: Winston Churchill casually dressed on vacation in Italy. He was at the Hotel and Casino at Gardone. July 30, 1949. / Bridgeman Images