With live explosives under a civilian apartment… ==
FSB indeed did exercise. And they didn’t use live explosive in exercise but imitators like the sacks of wheat or sugar.
They needed to recheck alertness of people and first respond services. They do it all the time to keep system alert.
So your “prove” just fakes invented out of borders of Russia by foreign propagandists.
CIA sending airplanes to WTC are conspiracy theories with zero proof==
Main prove is that CIA knew about the group of bombers was preparing but never alert or arrest anyone them themselves like they wanted them to succeed.
It is a similar conspiracy theory like about FSB. And they are disseminated by same types of people. Delirious and crazy.
Witnesses on the scene denied it looked anything like sugar, and if you watched the documentary put up by Cronos, the FSB claimed it was "just sugar," but took 5 months of testing to make this claim, and then blew the sugar up with explosives. All the while claiming "it was just sugar".
The thing about Russkies is they have all these devious schemes, but once they're caught they lie like they're actually very stupid.
They do it all the time to keep system alert.
You are just a bootlicker repeating nonsense you think the FSB would say. You're an idiot or a Russian bot. One or the other.