July 27 (UPI) -- On this date in history:
In 1794, Maximilien Robespierre, architect of the French Revolution's Reign of Terror, was overthrown and arrested by the National Convention. Robespierre, who encouraged the execution, mostly by guillotine, of more than 17,000 enemies of the revolution, was himself guillotined the following day.
In 1909, Orville Wright set a record by staying aloft in a plane for 1 hour, 12 minutes, 40 seconds.
In 1921, at the University of Toronto, Canadian scientists Frederick Banting and Charles Best successfully isolated insulin -- a hormone they believed could prevent diabetes -- for the first time.
In 1953, a truce officially ended the Korean War, which had begun June 25, 1950.
In 1980, Mohammed Reza Pahlavi, deposed shah of Iran, died in an Egyptian military hospital of cancer at age 60.
In 1986, Greg LeMond, 25, of Sacramento, became the first American to win cycling's most famous contest, the Tour de France.
In 1989, a Korean Air DC-10 crashed in heavy fog while attempting to land at Tripoli airport in Libya, killing 82 people, four of them on the ground.
In 1996, a bomb exploded at Olympic Park in Atlanta during the Summer Games, killing two people and injuring more than 100 other people.
In 2002, nine coal miners were trapped 240 feet underground in southwestern Pennsylvania when a wall collapsed, inundating them with water. A three-day rescue operation saved them all.
In 2003, legendary comic Bob Hope died of pneumonia at his home in Toluca Lake, Calif. He was 100 years old.
In 2012, the Summer Olympics opened in London, with 10,820 athletes representing 204 countries.
In 2017, Reince Priebus resigned as President Donald Trump's chief of staff, marking the shortest non-interim term in that post in history.