In England, September 15, 1940, is remembered as the day of the biggest daylight bombing raid of Britain by the German Luftwaffe. The German air attacks had begun in June 1940, and beginning September 7, bombs rained on London for 57 consecutive nights. The Royal Air Force (RAF) had a secret advantage—radar—and the early warning gave RAF pilots a half-hour’s notice of German planes taking off from France. The Luftwaffe was finally defeated in April 1941. Today, the RAF and civilian aviation organizations commemorate Battle of Britain Day with air displays of various kinds. Discuss