conspiracy, easy to find

It had to be September 11th, don't you see? It was all planned you see.

[anagrams]

Event them Bleepers
Bee Helmets Prevent
Then Peeves tremble
Pee seventh; tremble
Seventh Temple Beer
Vent them, be sleeper
Shelter even be temp
Them bee never slept
Even them be respelt
Beepers melt vent, eh?
Vent, Mel pee sherbet

I just used the malarky code on a book and found out secrets to upcoming events. I won't type them until I am right, otherwise it would be shown to be false.