1543 – French troops invade Luxembourg.
1947 – The Roswell UFO incident took place.
1967 – The civil war in Biafra began.
1969 – In Canada, the Official Languages Act was adopted making the French language equal to the English language throughout the Federal government.
1978 – The Solomon Islands became independent from the United Kingdom.
2005 - Four bombs were set off on the London public transport system during the morning rush hour, killing 56 people, and injuring 700. It was the deadliest single act of terrorism in the UK since the bombing of Pan Am Flight 103 in 1988, which killed 270 people. A group called "Al Qaeda in Europe" claimed responsibility for the attacks.
2006 – The Western Black Rhinoceros, the rarest of the Black Rhino subspecies, was declared extinct by the World Conservation Union, due to poaching.