President Harry S. Truman signs the Atomic Energy Act of 1946 — Behind the President, left to right: Senators Tom Connally, Eugene D. Millikin, Edwin C. Johnson, Thomas C. Hart, Brien McMahon, Warren R. Austin, and Richard B. Russell.
Photo Credit: Department of Energy Office of History and Heritage - Public Domain, https://commons.wikimedia.org/w/index.php?curid=1391431