41 – Roman Emperor Caligula, known for his eccentricity and sadistic despotism, is assassinated by his disgruntled Praetorian Guards, who then proclaim Caligula’s uncle, Claudius, as emperor of Rome.
1942 – The Allies bombard Bangkok, leading Thailand, then under Japanese control, to declare war against the U.S. and the U.K.
1986 – Voyager 2 passes within 50,600 miles of Uranus.
2014 – Three bombs explode in Cairo, Egypt, killing seven people and injuring 100 others.