2017 - The Unite the Right rally occurs in Charlottesville, Virginia, leading to the deaths of 3 and injuring nearly 50 more.

1981 – The IBM Personal Computer is released.

1953 – First thermonuclear bomb test: The Soviet atomic bomb project continues with the detonation of "RDS-6s" (Joe 4) using a "layered" scheme.

1883 – The last quagga dies at the Natura Artis Magistra, a zoo in Amsterdam, Netherlands.

1984 – "We begin bombing in five minutes": United States President Ronald Reagan, while running for re-election, jokes while preparing to make his weekly Saturday address on National Public Radio.

1942 – Actress Hedy Lamarr and composer George Antheil receive a patent for a Frequency-hopping spread spectrum communication system that later became the basis for modern technologies in wireless telephones, two-way radio communications, and Wi-Fi.

1929 – Babe Ruth becomes the first baseball player to hit 500 home runs in his career with a home run at League Park in Cleveland, Ohio.

1974 – As a direct result of the Watergate scandal, Richard Nixon becomes the first President of the United States to resign from office. Vice President Gerald Ford becomes president.

1945 – World War II: Nagasaki is devastated when an atomic bomb, Fat Man, is dropped by the United States B-29 Bockscar. Thirty-five thousand people are killed outright, including 23,200–28,200 Japanese war workers, 2,000 Korean forced workers, and 150 Japanese soldiers.

1944 – The United States Forest Service and the Wartime Advertising Council release posters featuring Smokey Bear for the first time.

1854 – American Transcendentalist philosopher Henry David Thoreau publishes his memoir Walden.

2022 – The Federal Bureau of Investigation (FBI) executes a search warrant at former president Donald Trump's residence in Mar-a-Lago, Palm Beach, Florida.

1974 – President Richard Nixon, in a nationwide television address, announces his resignation from the office of the President of the United States effective noon the next day.

1969 – At a zebra crossing in London, photographer Iain Macmillan takes the iconic photo that becomes the cover image of the Beatles' album Abbey Road.

1576 – The cornerstone for Tycho Brahe's Uraniborg observatory is laid on the island of Hven.

1944 – IBM dedicates the first program-controlled calculator, the Automatic Sequence Controlled Calculator (known best as the Harvard Mark I).

2012 – NASA's Curiosity rover lands on the surface of Mars.

1996 – NASA announces that the ALH 84001 meteorite, thought to originate from Mars, contains evidence of primitive life-forms.

1991 – Tim Berners-Lee releases files describing his idea for the World Wide Web. WWW makes its first appearance as a publicly available service on the Internet.

1945 – World War II: Hiroshima, Japan is devastated when the atomic bomb "Little Boy" is dropped by the United States B-29 Enola Gay. Around 70,000 people are killed instantly, and some tens of thousands die in subsequent years from burns and radiation poisoning.