Leslie Groves
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Leslie Richard Groves Jr. was a United States Army Corps of Engineers officer who oversaw the construction of the Pentagon and directed the Manhattan Project, a top secret research project that developed the atomic bomb during World War II.
Groves in 1948
Northwest exposure showing construction of the Pentagon, 1 July 1942
Groves ran the Manhattan Project from the fifth floor of the New War Department Building.
Groves (left) and Robert Oppenheimer
The Pentagon
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The Pentagon is the headquarters building of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was constructed on an accelerated schedule during World War II. As a symbol of the U.S. military, the phrase The Pentagon is often used as a metonym for the Department of Defense and its leadership.
A view of The Pentagon from the south in September 2007
The main Navy Building (foreground) and the Munitions Building were temporary structures built during World War I on the National Mall. The Department of War was headquartered in the Munitions Building for several years before moving into the Pentagon.
The Hall of Heroes on the Pentagon's main concourse
Military police keep back Vietnam War protesters during their sit-in at the Pentagon's National Mall entrance on 21 October 1967