EVB2947994: Chicago Pile-1 (CP-1) was built under the direction of physicist Enrico Fermi, in collaboration with Leo Szilard. Drawing of scientists using the world's first nuclear reactor, which was constructed under the football grandstands at the University of Chicago. By Melvin A. Miller of the Argonne National Laboratory / Bridgeman Images
EVB2948009: Young Bess Wallace, the future First Lady, Bess Truman. July 1898. Bess and Truman graduated from high school in the same class in 1901. They were then separated until a chance meeting in 1910. Financial setbacks and WW1 delayed their wedding to until 1919, Unknown photographer, (19th century) / Bridgeman Images
EVB2948102: NYC Fireman takes a break during the rescue operations on Sept. 14, 2001. Only 13 people were from rescued alive from under the debris, and those were found within the first 24 hours. New York City, after September 11, 2001 terrorist attacks. U.S. Navy Photo by Jim Watson / Bridgeman Images