2017: A ransomware attack attacks over 400 thousand computers worldwide, targeting computers of the UK'S National Health Services and Telefónica computers.
2015: Massive Nepal earthquake kills 218 people and injures more than 3500.
2015: A train derailment in Philadelphia kills eight people and injures more than 200.
2002: Former US President Jimmy Carter arrives in Cuba for a five-day visit with Fidel Castro, becoming the first President of the United States, in or out of office, to visit the island since Castro's 1959 revolution.
1998: Four students are shot at Trisakti University, leading to widespread riots and the fall of Suharto.
1989: The San Bernardino train disaster kills four people. A week later an underground gasoline pipeline explodes killing two more people.
1978: In Zaire, rebels occupy the city of Kolwezi, the mining center of the province of Shaba (now known as Katanga); the local government asks the US, France and Belgium to restore order.
1968: Vietnam War: North Vietnamese and Viet Cong forces attack Australian troops defending Fire Support Base Coral.
1965: The Soviet spacecraft Luna 5 crashes on the Moon.
1949: The western occupying powers approve the Basic Law for the new German state: the Federal Republic of Germany.
1949: The Soviet Union lifts its blockade of Berlin.
1948: Wilhelmina, Queen regnant of the Kingdom of the Netherlands, cedes the throne.
1942: World War II: The U.S. tanker SS Virginia is torpedoed in the mouth of the Mississippi River by the German submarine U-507.
1933: The Agricultural Adjustment Act is enacted to restrict agricultural production by paying farmers subsidies.
1932: Ten weeks after his abduction, the infant son of Charles Lindbergh, Charles Jr., is found dead in Hopewell, New Jersey, just a few miles from the Lindberghs' home.
1926: The Italian-built airship Norge becomes the first vessel to fly over the North Pole.
1885: North-West Rebellion: The four-day Battle of Batoche, pitting rebel Métis against the Canadian government, comes to an end with a decisive rebel defeat.
1881: In North Africa, Tunisia becomes a French protectorate.
1865: American Civil War: The Battle of Palmito Ranch: The first day of the last major land action to take place during the Civil War, resulting in a Confederate victory.
1864: American Civil War: The Battle of Spotsylvania Court House: Thousands of Union and Confederate soldiers die in "the Bloody Angle".