EVB2947559: New York governor Nelson Rockefeller talking with his youngest son, Michael, at Harvard in June 1960. Michael disappeared after a boating mishap in New Guinea in Nov. 1961 / Bridgeman Images

EVB2947604: Ernest Lawrence, Glenn Seaborg, and Robert Oppenheimer at the Radiation Laboratory. All three scientists were working at the University of California, Berkeley. Early 1946. / Bridgeman Images

EVB2947625: Yonkers, New York, c. 1980. Public School No. 3, Hamilton Avenue between Ludlow and Morris Streets. Westchester County, NY / Bridgeman Images

EVB2947643: President Barack Obama talks with co-producer Michele Tasoff during a break in taping. On the set of 'The Tonight Show with Jay Leno' at NBC Studios in Burbank, Calif., Oct. 25, 2011 / Bridgeman Images

EVB2947676: President Barack Obama with 2010 NASCAR Champion Jimmie Johnson and his wife, Chandra. Red Room of the White House, Sept. 7, 2011 / Bridgeman Images

EVB2947691: President Barack Obama with bare feet in front of the Shwedagon Pagoda. All visitors must remove their shoes and socks while touring the pagoda. Yangon, Myanmar (Rangoon, Burma), Nov. 19, 2012 / Bridgeman Images

EVB2947498: Harry Gold under arrest for spying in 1950. He confessed to espionage and helping Klaus Fuchs pass Manhattan Project secrets to the Soviets. / Bridgeman Images

EVB2947528: Western Electric model 500 Rotary dial telephone made in the 1950s. It remained the Bell System's standard model until 1984. It was designed by the firm of industrial designer Henry Dreyfuss. / Bridgeman Images

EVB2947718: President Barack Obama greets local residents on Main Street in Moneygall, Ireland, May 23, 2011 / Bridgeman Images

EVB2947733: President Barack Obama greets Mexican President Enrique Pena Nieto. Palacio Nacional in Mexico City, Mexico, May 2, 2013 / Bridgeman Images

EVB2947567: Democratic Senator Daniel Moynihan in the U.S. Capitol, Jan 24, 1977. He served in the Kennedy, Johnson, Nixon, and Ford Administrations before he was elected to the Senate in 1976. / Bridgeman Images

EVB2947633: Yonkers, New York, c. 1980. Moquette Row Housing, are 18th century industrial housing reminiscent of architecture in industrial cities of Scotland. View east showing south elevation from Orchard Street. Westchester County, NY / Bridgeman Images

EVB2947648: First Lady Michelle Obama during a taping of the 'Late Show with David Letterman'. March 19, 2012 / Bridgeman Images

EVB2947663: Carole King singing on stage in the White House East Room. President Obama presented King with the 2013 Library of Congress Gershwin Prize for Popular Song. May 22, 2013 / Bridgeman Images

EVB2947672: President Barack Obama stands with 2010 National Medal of Science recipients. From left, are: Dr. Richard A. Tapia; Dr. Peter J. Stang; Dr. Shu Chien; Dr. Srinivasa S.R. Varadhan; The President; Dr. Jacqueline K. Barton; Dr. Ralph L. Brinster; and Dr. Rudolf Jaenisch. Blue Room of the White House, Oct. 21, 2011 / Bridgeman Images

EVB2947684: Prime Minister Julia Gillard proposes a toast to President Barack Obama. At the Parliamentary Dinner at Parliament House in Canberra, Australia, Nov. 16, 2011 / Bridgeman Images

EVB2947702: President Barack Obama after a Land Titling event at the Plaza de San Pedro, Cartagena, Colombia. Families were given titles to land they farmed for decades. President Juan Manuel Santos of Colombia is at right. April 15, 2012 / Bridgeman Images

EVB2947741: President Barack Obama talks with Prime Minister Dmitry Medvedev of Russia. At the G8 Summit at Camp David, May 19, 2012 / Bridgeman Images

EVB2947778: President Barack Obama kisses First Lady Michelle Obama for the 'Kiss Cam'. Malia and Joe Biden watch the kiss on Jumbotron screens the Verizon Center in Washington, D.C. July 16, 2012. They were attending the U.S. Men's Olympic basketball team's game against Brazil / Bridgeman Images

EVB2947784: First Lady Michelle Obama at Parklawn Elementary School in Alexandria, Va. Jan. 25, 2012. She visited the school with Agriculture Secretary Tom Vilsack to sample improved school lunches with improved nutrition standards / Bridgeman Images

EVB2947805: President Barack Obama meeting with senior advisors. Saturday, Dec. 29, 2012 / Bridgeman Images

EVB2947814: President Barack Obama talks with former President Bill Clinton. April 29, 2012 (photo) / Bridgeman Images

EVB2947823: Secretary of State Hillary Rodham Clinton meets with Archbishop Desmond Tutu. Oct. 10, 2012. Tutu was the first black Archbishop of Cape Town of the Anglican Church of Southern Afric. He received the Nobel Peace Prize in 1984 for his opposition to apartheid / Bridgeman Images

EVB2947862: NYC firefighter walks among the old headstones at Trinity Church Cemetery in lower Manhattan. Sept. 19, 2001. The church grounds contain the graves of notable 18th and 19th century New Yorkers, including Alexander Hamilton and John Jacob Astor. New York City, after September 11, 2001 terrorist attacks / Bridgeman Images

EVB2947880: Pile of debris from the South Tower of World Trade Center a month after the terrorist attack. Oct. 10, 2001. The pile is reduced after a month of recovery operations searched for remains of the 479 firemen, police, and building workers lost when the WTC 2 collapsed. New York City, after September 11, 2001 terrorist attacks / Bridgeman Images

EVB2947901: An F-16 escorting Air Force One from Offutt Air Force Base in Neb. to Andrews Air Force Base. Sept. 11, 2001. After the 9-11 Terrorists attacks, jet fighters were scrambled to patrol the airspace above Washington, D.C. and New York City / Bridgeman Images

EVB2947904: President George W. Bush reviews notes with Karen Hughes before speaking from the Oval Office. He spoke 12 hours after the 9-11 Terrorist attacks on New York City and Washington, D.C. Sept. 11, 2001 / Bridgeman Images

EVB2947776: President Barack and Michelle Obama in the Library of the White House, Feb. 19, 2013. They were recording a message for ABC 'Good Morning America' anchor Robin Roberts / Bridgeman Images

EVB2947812: George H. W. and Barbara Bush present President Barack Obama with a pair of colorful socks. July 15, 2013 (photo) / Bridgeman Images

EVB2947946: President George W. Bush with Chiefs of Staff, Oct. 24, 2001. Meeting with him are from left: Adm. Richard Mies, Gen. Eric Shinseki, Gen. Peter Pace, and Gen. Michael Williams / Bridgeman Images

EVB2947848: President Barack Obama jokes with Dallas Mavericks basketball players. The 2011 NBA Champions were honored at the White House on Jan. 9, 2012 / Bridgeman Images

EVB2947961: President Bill Clinton meet with Republican Congressional leaders in 1993 / Bridgeman Images

EVB2947970: President Bill Clinton at a 'Get Out the Vote' Rally in Los Angeles, c. Five days before the 2000 National Election, Clinton works a crowd in support of his Vice President, Al Gore, who was opposed by Republican George W. Bush / Bridgeman Images

EVB2947917: President George W. Bush grasps the hand of his father, former President George H. W. Bush during the service for the victims of the 9-11 Terrorist Attacks, 2001 (photo) / Bridgeman Images

EVB2947926: President George W. Bush prior to meeting with the Russian Foreign Minister, Sept. 19, 2001. Bush 43 with Sec. of State, Colin Powell, and National Security Adviser, Condoleezza Rice / Bridgeman Images

EVB2948009: Young Bess Wallace, the future First Lady, Bess Truman. July 1898. Bess and Truman graduated from high school in the same class in 1901. They were then separated until a chance meeting in 1910. Financial setbacks and WW1 delayed their wedding to until 1919, Unknown photographer, (19th century) / Bridgeman Images