Molten Steel -
Quite a few things wrong with this. First off, it was "confirmed" by three sources:
Mark Loizeaux of Controlled Demolition, Inc
Peter Tully, President of Tully Construction
American Free Press newspaper
Loizeaux was merely reporting what Tully told him, he will NOT give personal confirmation, because he can't. AFP was simply reporting what these two said. So one source?
Others who reported it often switched back between molten "steel" and molten "metal". Not to mention many were using second hand info. On top of which, the use of the word molten seems to have been thrown around quite carelessly. The fire was definitely hot enough to heat up the metal to where it was "glowing red", and have it lose it's shape. Molten means liquid. Some of the reports state there were MOLTEN STEEL BEAMS! Molten beams? Are you freaking joking? If it's a beam, it sure as heck isn't molten. And if it's glowing red, it's really freaking hot, but it's not the orange molten liquid most of you are thinking of. Let's not forget, how did they know it was steel, and not some other metal, if it was truly molten?
On top of that, we have other things than jet fuel burning you know. Most modern offices will have large quantities of hydrocarbon fuels in decorations, furniture, computer/electronics, polymers, plastics, artificial leathers, laminates, etc... The fire becomes much more severe than your standard house fire, let alone an outdoor fire. Enclosed fires will continue to build up heat over time until they reach their peak.
As far as oxygen, it could have filtered in from above, or even below (subway lines). It's not like this collapse created a completely air tight environment on all sides. It's falling rubble, come on.
The fires would have reached 1000C (1832F) quite easily, and was shown in normal tests done by the Structural Fire Engineering department of the University of Manchester. Add in ordinary fuels with a little plastic, and the right conditions, and peaks of 1301C (2372F) can be reached.
It's not just about what temp jet fuel burns at. Not by a long shot. Burn a barrel of it outside compared to an enclosed space, you'll come up with two different numbers.
Nobody really knows for sure how hot it got in there. We might never know. What we do know is that it was definitely hot enough to make steel glow red hot and lose it's structural integrity. We also know that there are a lot of conflicting reports about "molten steel" vs "molten metal" and "molten steel BEAMS". Most of these people are not qualified to even be making such statements. And some did it for dramatic effect. Again, don't just believe everything you read.
http://911myths.com/html/wtc_molten_steel.html
And of course...
Demolition -
I'll keep this one a bit shorter.
Progressive collapses do happen outside of demolitions, it's not as rare as certain people would have you believe.
Again, the root page for the above link also explains things about the speed the building fell at, the "explosions" you see that look like bombs demolishing the building, and all sorts of other stuff.
It's been explained. If you want the real answers, instead of the same questions that have already been addressed, you simply have to look outside the conspiracy theory sites. None of us should have to be bearing out the truth here, just to prove it to you. The answers had already been provided, but you're not looking for them. You're looking for reasons not to believe.
But hey, whatever helps you sleep at night I guess...