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Meeting in the Radiation Laboratory at the University of California, Berkeley (UCB) in March 1940 to discuss the 184-inch cyclotron. From left: 1939 Physics Laureate Ernest O. Lawrence, 1927 Physics Laureate Arthur H. Compton, Vannevar Bush, James B. Conant, Karl Compton, and Alfred Loomis.
Source: Lawrence Berkeley Laboratory
Public domain via Wikimedia Commons