American Revolutionary War: Lancaster, Pennsylvania becomes the capital of the United States, for one day after the Second Continental Congress evacuates Philadelphia to avoid invading British forces.
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.
The stage musical Hair opens at the Shaftesbury Theatre in London, where it played 1,998 performances until its closure was forced by the roof collapsing in July 1973.
In Afghanistan, the Taliban capture the capital city Kabul after driving out President Burhanuddin Rabbani and executing former leader Mohammad Najibullah.