1940 - Britain launched a massive naval operation to evacuate defeated Allied forces from the beaches of Dunkirk.
1942 - Britain and the Soviet Union signed a treaty for full cooperation during and after World War II.
1969 - The lunar spacecraft "Apollo 10" re-entered Earth's atmosphere and dispersed in the Pacific Ocean.
1972 - The United States and the Soviet Union signed the first Strategic Arms Limitation Treaty (SALT 1) and nuclear arms control agreement.
1986 - The Flag of Europe was officially adopted as a symbol of the European Union.
1988 - The Edmonton Oilers, with captain Wayne Gretzky, won the Stanley Cup.
2001 - The U.S. Congress gave final approval to a $1.35 trillion tax reduction package, a top priority for President George Bush.
2002 - French-Polish director Roman Polanski won the Palme d'Or at the Cannes Film Festival for his film "The Pianist".
2004 - The Sudanese government and the Sudan People's Liberation Army (SPLA) signed agreements in Kenya on how to share power and manage disputed strategic areas.
2005 - "National Sorry Day" was launched in Australia to acknowledge the thousands of Indigenous children who were forcibly removed from their homes between 1930 and 1950.
2009 - Rebels who had controlled northern Ivory Coast since 2002 officially handed the region over to civilian administrators in an effort to restore government authority over the world's largest cocoa producer.
