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?