It did happen...
3 seconds sound clip from the Good Morning, Vietnam movie soundboard.
You can hear this line at 01:04:16 in the Blu-ray version of the movie.
Quote context
[...]
- Listen, it's an actual event. Where do you think this came from? Shaving?
- It's the truth. I just wanna report the truth. It'd be a nice change of pace.
- This not official news, airman. And as far as I'm concerned, it didn't happen.
- What are you afraid of? That some people might find out there's a war going on?
- This news is not official, airman.
- You want everyone going under the assumption it's perfectly safe here, don't you? Well, it's not.
- The fighting's not just in the hills. It's downtown...
[...]