1905 - The physics journal Annalen der Physik published Albert Einstein's paper "Does the Inertia of a Body Depend Upon Its Energy Content?", introducing the equation E=mc².
1916 - Iyasu is proclaimed deposed as ruler of Ethiopia in a palace coup in favor of his aunt Zauditu.
1956 - USAF Captain Milburn G. Apt becomes the first man to exceed Mach 3 while flying the Bell X-2. Shortly thereafter, the craft goes out of control and Captain Apt is killed.
1977 - The 300 metre tall CKVR-TV transmission tower in Barrie, Ontario, Canada is hit by a light aircraft in a fog, causing it to collapse. All aboard the aircraft are killed.