[Selene]

Rsywong,

In addition to my comments above re your post about "plane into twin towers" etc - (and you still - even with that image - wouldn't have had any info on the timing. You could be decades away. And, would you know from the image: Is it an accident? Deliberate? What causes it? And who would you warn?...!)

You said:

"I believe if time travel is possible, the traveller ETs (or humans) must know the precise times of major events so that time travelling can even make sense (Wouldn't they choose to enter a time before a major catastrophe? What is "before"?)...."

According to Dan Burisch who, as Maj-9, actually worked with an ET from 52,000 years in our future at Groom Lake, level S-4, and became familiar with the military's secret Stargate time-travel devices (Project Camelot Dan Burisch summary), the Et's themselves say that they can travel backwards in time to enter known events, but even for them the future is always probabilistic. You can only go to "probable" futures.

And again, according to Dr. Burisch, the Et's did in fact come back to our present age in an attempt to divert a future PROBABLE (in our terms) catastrophe that is a "fact" in their history. This "fact" - importantly - seems to have been successfully altered now. This is the so-called Doctrine of Convergent Time Paradox (DCTP) that Dr. Burisch discusses more fully in his Camelot videos, the "timeline 1 versus timeline 2" problem. .Project Camelot interviews Dan Burisch

It's a complex issue; much food for thought in these videos.

Cheers,
Selene