The news media knew that Brian Williams had been lying all these years. The people on that flight with him from nbc knew, the tape shot that day proved that he was lying.
The stories he kept telling just got more and more outrageous.
I suspect that someone had enough of this pompous windbag and released the Katrina story and the Iraq stories to get rid of him.
It’s been reported that NBC execs. Knew the story was bogus and had told Lyon Brian to clam up years ago. I would guess the Film crew had a smedgin more integrity and were the ones that leaked the truth back in the day. I doubt anyone in the Military bothered to watch the NBC Nightly news, otherwise this would have broke earlier.