1973 – Watergate scandal: In Orlando, Florida, U.S. President Richard Nixon tells 400 Associated Press managing editors "I am not a crook."

1947 – American scientists John Bardeen and Walter Houser Brattain observe the basic principles of the transistor, a key element for the electronics revolution of the 20th century.

1947 – The Screen Actors Guild implements an anti-Communist loyalty oath.

1800 – The United States Congress holds its first session in Washington, D.C.

1974 – The Arecibo message is broadcast from Puerto Rico.

1938 – LSD is first synthesized by Albert Hofmann from ergotamine at the Sandoz Laboratories in Base

1914 – The Federal Reserve Bank of the United States officially opens.

2022 – The world population reached eight billion.

1971 – Intel releases the world's first commercial single-chip microprocessor, the 4004.

1943 – The Holocaust: German SS leader Heinrich Himmler orders that Gypsies are to be put "on the same level as Jews and placed in concentration camps".

1938 – Nazi Germany bans Jewish children from public schools in the aftermath of Kristallnacht.

 Red_Dragon wrote:

I remember when our high school got a laser to play with, about 10 years after this. It cost more than a Volkswagen and was about the size of a shoebox. I didn't realize they were *that* new.

1967 – American physicist Theodore Maiman is given a patent for his ruby laser systems, the world's first laser.

1960 – Ruby Bridges becomes the first black child to attend an all-white elementary school in Louisiana.

1960 – Ruby Bridges becomes the first black child to attend an all-white elementary school in Louisiana.

1952 – The New Musical Express publishes the first regular UK Singles Chart.

1922 – The British Broadcasting Company begins radio service in the United Kingdom.

1851 – Moby-Dick, a novel by Herman Melville, is published in the USA.

 Red_Dragon wrote:

I just got to the wiki tab I opened on this. I've been in/around phone companies a lot, and this surprised me - partly because I recall having to involve an operator for long distance calls from Dallas in the 70s. Despite the NANP, you still needed a toll operator involved for a long time. AT&T/Bell Labs had procedures and policy for everything. They also had strong unions and operated in a weird regulatory space. So I'm not really surprised it took them 25+ years to fully roll out NANP.