I love when folk say the word "impossible." There is very little in this world when it comes to human want and desire to achieve things that is impossible.
We put a man on the moon!?
No one has kept anything secret, it's all been exposed in various ways and then completely discredited as you would expect if it was true. It's no secret and still people won't believe.
Blow up a couple of buildings..... impossible??? Utter bullshit.