ON THIS DAY IN TEENAGE HISTORY (1925), Theodore A. Hall was born. He graduated from Harvard at eighteen and at nineteen in 1944 became the youngest physicist working on the Manhattan Project, the secret U.S. project to develop an atomic bomb. Many years later it was revealed the Hall had passed A-bomb secrets to the Soviet Union. He explained his actions in Bombshell: The Secret Story of America’s Unknown Spy Conspiracy (Joseph Albright, Marcia Kunstel, 1997). “During 1944,” he said, “I was worried about the dangers of an American monopoly of atomic weapons if there should be a postwar depression.” Albright and Kunstel contend in their book that Hall gave the Soviets information on a new way to ignite an atomic bomb by using pressure, a tip that enabled the Soviets to build an atomic bomb years before they otherwise could have. Hall was questioned by the FBI in 1951 but was never charged with any wrongdoing. He moved to Great Britian in 1962 and died at age seventy-four in 1999.