1909 – He was born in Santa Barbara, California on the 30th of May.
1945-1970 – He served as director of the Los Alamos National Laboratory for 25 years.
– He was in charge of the final assembly of "the gadget", detonated in July for the Trinity test.
– He oversaw the transition of the laboratory from World War II through the Cold War.
1997 – He died on the 20th of August.