Im pretty sure that flying two giant metal aircraft at high speeds into buildings would do the job.

If you look at the footage, there are no extra explosions that bring the towers down.

Also, the jet fuel burning was hot enough to bring down 50% of the steel pillar's strength, resulting in it's down fall.

Plus, the theory is that the steel was melted. Explosions wouldn't melt steel, so this would mean that a giant team of welders hired by Bush would have to sneak into the tower after the planes hit it and start melting that steel. Or, Bush paid Dr. Evil to fire his laser at it.

And, the guy who said the steel was melted ACTUALLY said that the warped steel LOOKED like it was melted. He came back saying "holy shit, i wasn't say IT WAS, i was just explaining it in an elementary point of view. The steel was so warped that it just LOOKED melted. Never meant for people to come up with bullshit conspiracies over this".

Keep in mind, I'm paraphrasing.

So maybe there were explosions. But, there's no proof of it... at all.

As for thermite and firemen theories, here's a reason why that shit is all bullshit:

Debunk thermite bullshit

Also, the site is good for any other theory these conspiracy nuts will come up with.

Alas, these people don't read the whole thing and bring out shit out of thin air. After we debunk it, they'll come up with something new. And so on and so fourth.

I'm not sure if this is a true fact, but I heard that the Towers were structurally designed to fall straight down, in the way that they did, to avoid damaging any surrounding buildings, and of course, people. So anyone who thinks that the Towers were brought down by multiple-floor explosives are...well, wrong.