Brian Williams is no different than the rest of us

I've two valid explanations as to why Brian Williams kept revising an event in his memory.
Pick your choice.

The well proven explanation:
The human brain is a terrible recorder of facts.
If you want anything close to accurate detail, then take a widescreen unedited video of the event.
Researchers have proven how easy it is to manipulate memories. (And Fox news continually proves how easy it is to manipulate video.)

Every single time you recall a memory, you will change it. In Brian William's case the edited tape his videographer made for a newscast created confusions of details from the very first. Which helicopter received fire?
How many helicopters were there?

Brian probably reviewed that film so often that it became his initial memory. 

Every time anyone would ask about the event and Brian shared, the details would change. Not because Brian wanted to lie to people, but because his brain kept altering the memory.

That's why his story changed over time. 
Because he's got a normal faulty human brain.
For additional information about faulty memories:
http://www.cnn.com/2015/02/05/opinion/vox-brian-williams/
http://petapixel.com/2013/07/28/manipulated-photographs-manipulated-memories/




Liza's Multiverse theory of why our brains are so faulty.

In the world of multiverses, not only can anything happen, but everything does happen in some universe.

I don't believe in infinity, thus for every universe created, another two universes must collapse into one based on statistical irrelevance. (By statistical irrelevance, I mean the differences in the two universes are no longer matter. Over time the relevance changes. For example, what we believed happened or didn't happen is far more relevant than what actually happened in 1 AD).

However, for two universes to be statistically "the same" doesn't mean there won't be significant differences in particulars.

We experience those differences as Deja Vue,  Precognition, and possibly some cases of schizophrenia where the people  a person remembers are actually remnants of a different universe that has collapsed into ours. 

If multiverses can cause us to relive a situation twice, or to see the future before it happens, imagine what it can do to the human brain when two slightly different situations are collapsed into one memory, which later will be collapsed into yet another slightly different memory.

In this case it is not that we have faulty memories, but we have multiple memories of the same event and one of them must dominate and become our truth, even if in our current universe, the external facts support a different truth.

This theory explains a great deal of oddities about our world, but it is a bit unnerving, so most of you will be more comfortable with the faulty memory theory.

But in either case, Brian Williams did not just wake up one day and decide to lie to the American public and destroy his career so he'd be more interesting on a talk show.

The 'truth' altered over time, either by faulty memories, which we all have, or by the collapse of multiverses, actually switching out the 'truth' with one similar but not the same.

So give Brian Williams a break. He's just a normal human. All our memories are false. If you don't believe me, ask your sibling to recall an event and both of you write the specifics of the event down. Choose an event of importance to you, since it is likely you've visited and changed it often.

Your memories of the event won't be the same.

Does that mean I have to give all the anchors of Fox News a break for their continual lies and misinformation?  No. But I hate to say it,  Bill O'Reilly may have actually 're-remembered' his value in society to be greater than it truly was due to the memory problem. 

However, unlike Brian who admitted he was wrong when presented irrefutable proof, Bill goes berserk calling all the reporters & interviewers who nailed him liars. Their different reaction to the truth could come from their emotional differences. 

So there it is: Either humans have horrible memories or the multiverses are changing reality all the time.

Either way, you really can't believe anything anyone tells you. 

Fox News doubly so.