I think the downvotes are because you jump to conclusions and the conclusion is "the government did it and covered it up". Sounds super kooky.
The science in the link is interesting, but note how it does not talk about why it happened that way. So it is disingenuous to say that the science says the government did it. Furthermore while these scientists believe that it was a simultaneous failure of all supporting columns there are others that think differently.
I find it fascinating that there is so much disagreement on the subject, and that how difficult is to reconstruct an event of such magnitude.
Even if there were explosives planted in the WTC to coincide with the plane crashes and guarantee the buildings' collapse, why would that suggest it is the US government? Couldn't that also be due to Al Queda or perhaps at a higher level the Saudi government? It's not the first time that Islamic terrorists tried blowing up the building.
WTC7, a solid steel 47-story building, spontaneously disintegrated and collapsed symmetrically into its footprint at near free-fall speed. This was due to small fires on the ground level, not the government.
EDIT: small fires at ground level have caused perfect symmetric demolitions of many skyscrapers since WTC7. This is why small fires are now the preferred method of demolition.
