Today in history: On June 22, 1938, in a rematch that bore the weight of both geopolitical symbolism and African American representation, American Joe Louis knocked out German Max Schmeling in just two minutes and four seconds to retain his heavyweight boxing title in front of 70,000 spectators at New York’s Yankee Stadium. Also on this date: In 1815, Napoleon Bonaparte abdicated for a second time as Emperor of the French. 1941, Nazi Germany launched Operation Barbarossa, a massive and