One thing that didn't officially happen was a bomb didn't officially explode at 1430 hours, unofficially destroying Jimmy Wah's Café.
9 seconds sound clip from the Good Morning, Vietnam movie soundboard.
You can hear this line at 01:05:46 in the Blu-ray version of the movie.
Quote context
[...]
- From England, today, Princess Margaret threw a shoe. Easy, Madge.
- Also Elizab... Queen Elizabeth, Liz... Elizabeth Taylor. Elizabeth Taylor.
- She's still married after six months. Way to go, Liz, hey.
- All right, in Saigon today, according to official sources, nothing actually happened.
- Break the goddamn door down.
- Turn the power off in that studio. Turn it off now.
[...]