• 1917 – World War I: Battle of Messines – Allied ammonal mines underneath German trenches at Messines Ridge are detonated, killing 10,000 German troops.
• 1919 – Sette giugno: Riot in Malta; four are killed.
• 1929 – The Lateran Treaty is ratified, bringing Vatican City into existence.
• 1936 – The Steel Workers Organizing Committee, a trade union, is founded in Pittsburgh, Pennsylvania. Philip Murray is elected its first president.
• 1938 – The Douglas DC-4E makes its first test flight.
• 1940 – King Haakon VII, Crown Prince Olav, and the Norwegian government leave Tromsø and go into exile in London.
• 1942 – World War II: The Battle of Midway ends.
• 1942 – World War II: Aleutian Islands Campaign: Japanese soldiers occupy the American islands of Attu and Kiska, in the Aleutian Islands off Alaska.
• 1944 – World War II: The steamer Danae carrying 350 Cretan Jews and 250 Cretan partisans is sunk without survivors off the shore of Santorini.
• 1944 – World War II: Battle of Normandy – At Abbey Ardennes members of the SS Division Hitlerjugend massacre 23 Canadian prisoners of war.
• 1945 – King Haakon VII of Norway returns with his family to Oslo after five years in exile.
• 1948 – Edvard Beneš resigns as President of Czechoslovakia rather than sign the Ninth-of-May Constitution making his nation a Communist state.
• 1955 – Lux Radio Theater signs off the air permanently. The show launched in New York in 1934, and featured radio adaptations of Broadway shows and popular films.
• 1965 – The Supreme Court of the United States hands down its decision in Griswold v. Connecticut, effectively legalizing the use of contraception by married couples.
• 1967 – Israeli forces enter Jerusalem during the Six-Day War.
• 1971 – The United States Supreme Court overturns the conviction of Paul Cohen for disturbing the peace, setting the precedent that vulgar writing is protected under the First Amendment.
• 1971 – The Alcohol, Tobacco, and Firearms Division of the U.S. Internal Revenue Service raids the home of Ken Ballew for illegal possession of hand grenades, which all turn out to be inert or dummies.
• 1975 – The inaugural Cricket World Cup begins in England.
• 1977 – 500 million people watch on television as the high day of Silver Jubilee of Queen Elizabeth II begins.
• 1981 – The Israeli Air Force destroys Iraq's Osiraq nuclear reactor during Operation Opera. The facility could have been used to make nuclear weapons.
• 1982 – Priscilla Presley opens Graceland to the public; the bathroom where Elvis Presley died five years earlier is kept off-limits.
• 1989 – Surinam Airways Flight 764 crashes on approach to Paramaribo-Zanderij International Airport in Suriname due to pilot error, killing 176 of 187 aboard.
• 1991 – Mount Pinatubo explodes generating an ash column 7 kilometres (4.3 mi) high.
• 1995 – The long-range Boeing 777 enters service with United Airlines.
• 1998 – James Byrd, Jr. of Texas is killed when white supremacists drag him behind a pickup truck along an asphalt pavement.
• 2000 – The United Nations defines the Blue Line as the border between Israel and Lebanon.
• 2006 – Abu Musab al-Zarqawi, the leader of Al-Qaeda in Iraq, is killed in an airstrike by the United States Air Force.

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