[May 21st, 1946] Dr. Louis Slotin, a physicist at the Los Alamos research center, is fatally injured during an experiment with a "subcritical nuclear assembly", a plutonium core and two halves of a beryllium sphere.
Baddiel, Skinner & Lightning Seeds' "Three Lions" song turns 30 today. When it came out, England's last (and only) World Cup victory was 30 years earlier, in 1966.
[May 20th, 1946] A U.S. Army C-45 transport plane crashed into the 58th floor of the 70-story Bank of Manhattan building on Wall Street, killing all five persons aboard