EVB2942078: Senator Edward Kennedy introduces his big brother, President John Kennedy. They were attending a Democratic Fund Raising Dinner at the Commonwealth Armory in Boston. Oct. 19, 1963 / Bridgeman Images

EVB2942239: Apollo 12 Pacific recovery. Astronauts are in a life raft near the Command module with a Helicopter hovering above. Nov. 24, 1969 / Bridgeman Images

EVB2942138: Apollo 11 Earth rise over the Moon. Earth on the horizon in the Mare Smythii Region of the Moon. Image 17 of a NASA sequence of 18. July 20, 1969 / Bridgeman Images

EVB2942144: Russian Space Station Mir. Mir was assembled in orbit from 1986 to 1996. It was still the largest artificial satellite to date when orbit decay caused it to fall to earth on in 2001. June 1995 photo / Bridgeman Images

EVB2942147: Space Shuttle Atlantis departing the Mir Russian Space Station. The first ever docking of the US Space Shuttle delivered two cosmonauts, Anatoly Solovyev and Nikolai Budarin, to the station, and retrieved American astronaut Norman Thagard. July 4, 1995 / Bridgeman Images

EVB2942150: Space Shuttle Discovery launched with Hubble Space Telescope in its cargo bay. April 24, 1990 / Bridgeman Images

EVB2942162: Construction work on International Space Station. Astronaut Michael Lopez-Alegria in a space walk near the Canadarm while assembling the International Space Station's backbone. Nov. 30, 2002 / Bridgeman Images

EVB2942201: Russian Mission Control Center in Korolev, outside Moscow. The monitors show live video from the Soyuz TMA-11 spacecraft of the International Space Station. Oct. 12, 2007 / Bridgeman Images

EVB2942219: Launch of the first Hermes A-1 rocket at White Sand Proving Ground. It combined the Herman V-2 exterior shape with entirely new internal design. May 5, 1950 / Bridgeman Images

EVB2942231: Apollo Project's prototype of the Lunar Landing Module in an early test flight / Bridgeman Images

EVB2942261: Launch of Endeavour, the 113th space shuttle mission. It delivered a structure for the International Space Station, ferried the Expedition 6 crew, and returned Expedition 5 crew. Nov. 13, 2002 / Bridgeman Images

EVB2942288: Space shuttle Challenger disaster. Six image sequence of the Challenger explosion in progress from 58.8 to 109.6 seconds after launch. Jan. 28, 1986 / Bridgeman Images

EVB2942306: Skylab 4 Astronaut Ed Gibson preparing his meal aboard the Skylab space station. Skylab 4 mission lasted 84 days, testing the effects of prolonged zero gravity. Nov. 16, 1973 -Feb. 8, 1974 / Bridgeman Images

EVB2942312: Iranians demonstrating in Tehran in support of the Shah in 1959 / Bridgeman Images

EVB2942327: Hillary Clinton, US Secretary of State, speaking at George Washington University, on August 16, 2011 / Bridgeman Images

EVB2941239: Richard Nixon posing with his Cabinet, 1972-73 / Bridgeman Images

EVB2941248: The 1960 Democratic nominees, Senators John Kennedy and Lyndon Johnson great the press together. Washington, DC, August 8, 1960 / Bridgeman Images

EVB2941308: Jack Benny performs for a Democratic Party find raiser at the Century Plaza Hotel, Los Angeles, California. June 23, 1967 / Bridgeman Images

EVB2941360: Threshing wheat in central Ohio. A farmer forks wheat into the feeding belt of stationary threshing machine. He stands on a horse drawn wagon loaded with cut grain from the nearby field. August 1938 / Bridgeman Images

EVB2941347: LBJ's Great Society programs. President Lyndon Johnson signing of the Higher Education Act of 1965 at Southwest Texas State College, where he attended college in the 1920s / Bridgeman Images

EVB2941378: Gardener's Cut Rate Package House sign advertising alcoholic beverages and gasoline prices. Waco, Texas, Nov. 1939 / Bridgeman Images

EVB2941383: Listening to the radio. A mother smiles at her daughter as they listen to the radio in their dugout home. It was one of the few radios in their rural neighborhood, and friends visited on winter nights to listen to music and news. Pie Town, New Mexico, Sept. 1940 / Bridgeman Images

EVB2941386: New Deal Utopian Community. Garment factory operators work at the Jersey Homesteads, a New Deal 'Subsistence Homesteads', designed to decentralize industry from congested cities and enable workers also practice subsistence agriculture. Nov. 1936 / Bridgeman Images

EVB2941398: Young boys at their desks in a rural Wisconsin school. Sept. 1939 / Bridgeman Images

EVB2941432: Kennedy and Johnson in 1960 Presidential Campaign. Lyndon Johnson and John Kennedy in convertible surrounded by supporters. Sept. 13, 1960, Muto, Frank / Bridgeman Images

EVB2941425: Rebekah Baines Johnson (1881-1958) in 1917. She attended college and encouraged her son, the future US President Lyndon Baines Johnson, to be educated, ambitious, and idealistic, Unknown photographer, (20th century) / Bridgeman Images

EVB2941506: South Vietnam Viet Cong with captured US 81mm mortar. 1965 / Bridgeman Images

EVB2941486: Refugees flee Tet Offensive in Hue. Refugees use a rope ferry to escape to the south shore of the Perfume River despite the destroyed bridge. c. February 1968 / Bridgeman Images

EVB2941489: An young Vietnamese widow mourns. Hugging a photo of her missing husband, she attends a mass funeral service for 400 killed in Hue during the Tet Offensive. Oct. 14, 1968 / Bridgeman Images

EVB2941498: USO entertains troops in Thailand. Comedienne Phyllis Diller rides in a tricycle rickshaw as the Bob Hope USO Christmas show arrives at Korat Air Base, Thailand. Dec. 1966 / Bridgeman Images

EVB2941504: Chi Thanh Nguyen (1914-1967), was a general during the First Indochina War against the French. In 1965 was the leading strategist and military commander of the People's Army of Vietnam until he died of a heart attack in July 1967 / Bridgeman Images

EVB2941507: Justice Abe Fortas (1910-1982), in a White House meeting on Nov. 2, 1967. When President Johnson appointed Fortas to the Supreme Court in 1965, he continued to advise Johnson on political and legal affairs / Bridgeman Images

EVB2941578: Indira Gandhi with President and Lady Bird Johnson before a State Dinner honoring the Indian Prime Minister. March 28, 1966 / Bridgeman Images

EVB2941602: Walter Rostow (1916-2002), at a meeting in the White House Cabinet Room, Oct. 8, 1968. Rostow, an economist, was a pro-Vietnam War national security advisor to Presidents Kennedy and Johnson / Bridgeman Images

EVB2941617: US-South Vietnam summit meeting. Nguyen Van Thieu, President Johnson and Nguyen Cau Ky salute during the playing of the US and Vietnamese National Anthems at Guam's International Airport. March 20, 1967 / Bridgeman Images

EVB2941609: Whitney Young (1931-1971), during a meeting with President Lyndon Johnson. Young was Executive Director of the National Urban League, a Civil Rights organization that expanded job opportunities for African Americans. Jan. 18, 1964 / Bridgeman Images