Harry Veeder wrote:
This is just my opinion...but It looks a bit like a layer of melted
aluminium on steel. The aluminium could have come from the plane.
That is what NIST concluded. See the ref. I posted previously:
11. Why do some photographs show a yellow stream of molten metal
pouring down the side of WTC2 that NIST claims was aluminum from the
crashed plane although aluminum burns with a white glow?
NIST reported (NCSTAR 1-5A) that just before 9:52 a.m., a bright spot
appeared at the top of a window on the 80th floor of WTC 2, four
windows removed from the east edge on the north face, followed by the
flow of a glowing liquid. . . .
NIST concluded that the source of the molten material was aluminum
alloys from the aircraft, since these are known to melt between 475
degrees Celsius and 640 degrees Celsius (depending on the particular
alloy), well below the expected temperatures (about 1,000 degrees
Celsius) in the vicinity of the fires. Aluminum is not expected to
ignite at normal fire temperatures and there is no visual indication
that the material flowing from the tower was burning."
- Jed
