What evidence exists of molten metal?
The twin towers were video taped extensively and there are many frames available such as this one: http://video.google.com/videoplay?docid=-2991254740145858863 Some images were captured from other videos, which I sourced from st911.org: In the above an object is falling whilst detaching from many small pieces that are glowing orange. NIST believe in their FAQ that this is aluminium mixed with impurities (debris). Notice how this frame is taken from a slightly different angle than the google video (ignore the arrows and numbers, they were present in the source). Further evidence was found in the wreckage. The following picture is taken from http://news.bbc.co.uk/1/hi/sci/tech/1858491.
