EVB2948297: President Barack Obama and VP Joe Biden with newly elected Chicago Mayor Rahm Emanuel, 16th November 2012 (photo) / Bridgeman Images

EVB2948428: Brigadier General Billy Mitchell and another man, attaching a bomb under wing of airplane. c. 1925. He advocated military aviation and foresaw the vulnerability of ships to aerial bombing. His fervor resulted in a court-martial for insubordination and his resignation / Bridgeman Images

EVB2948444: U.S. Armed Forces Joint Chiefs of Staff under President Eisenhower, 1953 / Bridgeman Images

EVB2948486: Leonard Bernstein, playing piano, amidst other musicians during a rehearsal in 1958 / Bridgeman Images

EVB2948422: African American postal employees sorting mail beside white workers. March 1, 1966, Washington, D.C. vicinity / Bridgeman Images

EVB2948446: Astrotarium, a portable planetarium, at Abraham & Straus store in Babylon, Long Island, New York. March 31, 1951. The space age science exhibit was set up in a parking lot at the Great South Bay Shopping Center / Bridgeman Images

EVB2948463: Businessmen eating at Pete's Bar in Washington Market, New York City, 1950 / Bridgeman Images

EVB2948471: Young woman operating a complex modern textile loom in Paterson, New Jersey. March 1937 photo by Lewis Hine, Hine, Lewis Wickes (1874-1940) / Bridgeman Images

EVB2948472: Big board in Merrill Lynch, Pierce, Fenner & Beane's office at 148 Pierrepont Street in Brooklyn. Stockholders and brokers keep current without commuting into Wall Street in Manhattan. July 1956 / Bridgeman Images

EVB2948200: Situation Room of the White House, during Hurricane Sandy, Oct. 29, 2012. Attending, clockwise from President Obama: John Brennan; Richard Reed; Chuck Donnell; Asha Tribble; David Agnew; Press Secretary Jay Carney; Deputy Chief of Staff for Operations: Alyssa Mastromonaco; and Chief of Staff Jack Lew / Bridgeman Images

EVB2948286: President Barack Obama meets with Homeland Security Secretary Janet Napolitano. Oval Office, White House, Jan. 31, 2012 / Bridgeman Images

EVB2948316: President Barack Obama with advisors in the Oval Office, June 5, 2013. From left: Samantha Power, former Sr. Dir. For Multilateral Affairs and Human Rights; Natl. Security Advisor Tom Donilon; and Susan Rice, Permanent Rep. to the UN / Bridgeman Images

EVB2948321: Pres. Barack Obama and VP Joe Biden meet with Combatant Commanders and senior military. Cabinet Room, White House, May 15, 2012 / Bridgeman Images

EVB2948333: Foreign Ministers and Political Directors from the P5+1 nations and Iranian Minister Javad Zarif. Photo taken at the conclusion of negotiations on April 2, 2015, in Lausanne, Switzerland, about the future of Iran's nuclear program / Bridgeman Images

EVB2948345: Women partisans who are fighting against the Germans in Yugoslavia. c. 1944, World War 2 / Bridgeman Images

EVB2948351: 1st Div. U.S. Marines were greeted by crowds of Chinese in Tientsin, in Sept. 1945. When Japan surrendered in 1945, the 50,000 Marines of the now unnecessary invasion force were sent to China. Their mission was to accept surrender from Japanese and repatriate them. Also to help the Nationalists (as opposed to Communists) reassert their control over areas vacated by the Japanese / Bridgeman Images

EVB2948394: U.S. tank firing in Saint Lo, France, July 1944. The Norman town strategically located at the intersection of main roads on the Lower Normandy Peninsula. France, World War 2 / Bridgeman Images

EVB2948397: French village women doing their share their laundry facility with GI's washing their Jeep. Sept. 20, 1944, World War 2 / Bridgeman Images

EVB2948406: British troops at action stations ready to provide covering fire for the infantry crossing a canal. Sept. 17-25. Operation Market-Garden planned to capture several bridges in Netherlands, but failed with 15,000 Allied casualties. A BRIDGE TO FAR, was a 1977 film based on Cornelius Ryan's 1974 book about the battle. World War 2 / Bridgeman Images

EVB2948436: Col. Mary Hallaren, Director of the WAC when it was fully integrated into the Army in June 1948. She served in the Women's Army Auxiliary Corps, and the Women's Army Corps during World War 2 / Bridgeman Images

EVB2948439: V-2 rocket, before launching at the U.S. Army proving grounds, White Sands, N.M. On May 7, 1946 its Flight-control instruments were adjusted on the launch pad. On May 10 it launched and reached an altitude of 112 kilometers, the first successful flight in the U.S / Bridgeman Images

EVB2948443: U.S. Air Force jets all with open cockpits on the crowded Da Nang flight line in South Vietnam. Sept. 12, 1965 / Bridgeman Images

EVB2948447: Neil Armstrong in the cockpit of the X-15, which he flew seven times from Dec. 1960 to July 1962. The rocket powered aircraft was flown over a period of nearly 10 years, setting unofficial records for speed 4,520 mph (Mach 6.7), and altitude of 354,200 feet (67 miles) / Bridgeman Images

EVB2948453: Vietnamese soldiers inspecting the shoreline from inside a boat to prepare for landing. Feb. 15, 1962. Photo by Robert Pepper Martin / Bridgeman Images

EVB2948466: Five fashion models holding hands and walking in a row with the sky as backdrop. August 1935, by Toni Frissell, Frissell, Toni (1907-88) / Bridgeman Images

EVB2948482: Actress Angela Lansbury with daughter Deidre and son Andrew, 1957 / Bridgeman Images

EVB2948501: Raphael Soyer, American Social Realist painter based in New York City, active from 1930 to 1980s. His brothers Moses Soyer and Isaac Soyer were also painters. 1946 Photo by Katherine Young / Bridgeman Images

EVB2948520: Test pilot Paul King in a fur lined leather flying suit and oxygen mask before take off, Oct. 17, 1925. He will fly the NACA Vought VE-7,from Langley Field, Hampton, Virginia. National Advisory Committee for Aeronautics, NACA, was a Federal agency established in 1915, and was the predecessor of NASA / Bridgeman Images

EVB2948530: Northeast view from NYC's Empire State Building includes the Chrysler Building. Jan. 19, 1932. In mid-distance is the Queensboro Bridge over the East River, and beyond that is the borough of Queens, and the Long Island Sound. Photo by Samuel H. Gottscho / Bridgeman Images

EVB2948553: James Duff, Appalachian fiddler in Hazard, Kentucky, c. 1934. By Doris Ulmann who made seven trips to the rural South between 1928-1934, photographing tradition bound people with a modern sensibility / Bridgeman Images

EVB2948560: Times Square north at night, New York City, Jan. 1934. Lighted signs advertise theaters, Burlesque and Vaudeville houses, and famous brand consumer products / Bridgeman Images

EVB2948583: President Richard Nixon and his entourage on the Great Wall during his trip to China. Feb. 24, 1972 / Bridgeman Images

EVB2948552: Lillian Gish as Yelena Andreyevna in Jed Harris's 1930 Broadway production of 'Uncle Vanya'. Photo by Doris Ulmann / Bridgeman Images

EVB2948558: Prefabrication housing developed for TVA (Tennessee Valley Authority's) employees in 1930s. Buildings could be relocated to worksites as needed and were competitive in cost with traditionally constructed housing / Bridgeman Images

EVB2948704: First Lady Grace Coolidge four days after the death of President Warren Harding. August 6, 1923. Photo was probably taken in the Coolidge's suite at the Willard Hotel / Bridgeman Images

EVB2948708: Calvin Coolidge adjusting a horse's harness on his father's farm in Plymouth, Vermont. c. 1920-23. Future President Calvin Coolidge wore a smock and leather boots while mowing hay / Bridgeman Images