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I can't find any instances of this question on this website, so here goes.

Conspiracy theorists often claim that molten steel was found at Ground Zero during and after 9/11. A typical example is this compilation [YouTube] of eyewitness accounts, news articles and statements by engineers, including one attributed to WTC chief engineer Leslie Robertson.

For further notability and clarity of the claim made, see Undisputed Facts Point to the Controlled Demolition of WTC 7, Response to NIST’s Invitation for Written Comments [PDF], which is quoted:

Mark Loizeaux, president of Controlled Demolition, Inc., who was hired for the Building 7 cleanup, said that “molten steel was found at 7 WTC.” Leslie Robertson, World Trade Center structural engineer, stated that on October 5, “21 days after the attacks, the fires were still burning and molten steel was still running.” Fire department personnel, recorded on video, reported seeing “molten steel running down the channel rails… like you're in a foundry – like lava from a volcano.” Joe O’Toole, a Bronx firefighter, saw a crane lifting a steel beam vertically from deep within a pile. He said “it was dripping from the molten steel.” Bart Voorsanger, an architect hired to save “relics from the rubble,” stated about the multi-ton “meteorite” that it was a “fused element of molten steel and concrete.”

To the best of my knowledge, molten steel is white hot. Not having gone through all of the claims, I can only say that I have not yet seen one description of the "molten steel" that mentions it being white hot, despite the noteworthy nature of such an extraordinary observation.

So, was molten steel, or evidence of such having existed, found in the remains of the World Trade Center?

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    @Fizz For our site, it's an issue because it's a common claim among the truthers. They then use that for further arguments involving heat and thermite, etc. If there was no molten steel in the first place, there you go. If there was, follow up questions on the meaningfulness of that may come. I thought we already had a question on this, however??? Took the form, "can steel melt for whatever reasons."
    – fredsbend
    Nov 6 at 13:58
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    A very close near dupe: Did molten aluminum pour from the WTC towers before they collapsed?
    – fredsbend
    Nov 6 at 14:04
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    @Abdullah I'm just trying to warn that we don't want a slew of questions "was it steel? was it aluminum? was it some other metal?" Let's just be sure to hedge against a goose chase.
    – fredsbend
    Nov 6 at 14:10
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    @blacksmith37: You don't have to provide internet references, but you do need to provide references. We can't check your personal CV, and we don't want to fall for an apoeal to authority. It isn't enough for you to know something, you need to show how you know.
    – Oddthinking
    Nov 6 at 17:44
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    @blacksmith37 The key is that no one here has any way to tell the difference between your answer based on experience and if say I wrote an answer contradicting what you said (despite my lack of experience with heated metals). External sources are therefore important. You could even cite a hard copy book, or some disaster analysis for refinery & chemical plant fires. The FAQ on the Meta site explains how Skeptics is a little different from many other sibling sites. Nov 7 at 6:41

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