On this date in history:
In 1623, in the first breach-of-promise lawsuit in the United States, the Rev. Greville Pooley sued Cicely Jordan in Charles City, Va., for jilting him for another man.
In 1775, the Continental Congress established the Army as the first U.S. military service.
In 1777, the Stars and Stripes became the national U.S. flag.
In 1922, Warren G. Harding became the first U.S. president to broadcast a message over the radio. The occasion was the dedication of the Francis Scott Key Memorial in Baltimore.
In 1933, the first Superman comic book -- Action Comic No. 1 -- was published.
In 1940, German troops marched down Paris' Champs-Élysées as Allied forces abandoned the French capital.
In 1951, Univac I, the world's first commercial computer, designed for the U.S. Census Bureau, was introduced.
In 1954, the phrase "under God" was formally added to U.S. Pledge of Allegiance.
In 1982, British Prime Minister Margaret Thatcher announced a cease-fire with Argentina, bringing to an end the Falkland Islands War after 74 days.
In 1985, Shiite Muslim gunmen highjacked TWA Flight 847 carrying 153 passengers and crew from Athens to Rome. The ordeal ended 17 days later in Beirut, where one of the hostages, a U.S. sailor, was killed.
In 1998, the Chicago Bulls won their sixth NBA title in eight years and third in a row, defeating the Utah Jazz in the championship series.
In 2003, the Czech Republic voted overwhelmingly to join the European Union.
In 2013, Hassan Rouhani was elected president of Iran.
In 2017, Ireland's parliament elected Leo Varadkar, the country's youngest and first openly gay prime minister.
In 2017, a fire at Grenfell Tower, a high-rise apartment building in west London, killed nearly 80 people.
In 2017, a gunman opened fire at a Republican team charity baseball practice in suburban Washington, D.C, seriously injuring House Republican Whip Steve Scalise of Louisiana. The shooting also left three others injured by gunfire and two more sustained injuries trying to flee.
In 2020, 19 people died and more than 172 were injured after a gas tanker exploded on a Chinese highway en route from Ningbo to Wenzhou.