4th Anniversary Reunion of Chicago Pile 1 Scientists

A group of physicists gathered on the steps of Eckhard Hall on the University of Chicago campus. The scientists all took part in the building of the first atomic pile in 1942 and are celebrating the fourth anniversary of the event. Back row, left to right: N. Hilberry, Samuel Allison, Thomas Brill, Robert Nobles, Warren Nyer, and Marvin Wilkenberg. Middle row, left to right: Harold Agnew, William Sturm, Harold Lichtenberger, Leona W. Marshall, and Leo Szilard. Front row, left to right: Enrico Fermi, Walter Zinn, Albert Wattenberg, and Herbert Anderson. | Location: Eckhard Hall, University of Chicago, Chicago, Illinois, USA. (Photo by © CORBIS/Corbis via Getty Images)