11th August 1921
Italian pilot Giovanni De Briganti piloting a Macchi M.7 wins the Schneider Trophy, the race for seaplanes and flying boats.
While on holiday at Lubec, Maine, future U.S. president (and recent U.S. vice presidential nominee in the 1920 election) Franklin D. Roosevelt suffered the first signs of paralysis from poliomyelitis. The disease was misdiagnosed by a local doctor as resulting a bad cold.