excerpt from Dr Jones paper:
http://www.physics.byu.edu/research/energy/htm7.html


Dramatic footage reveals yellow-to-white hot molten metal dripping from the
South WTC Tower shortly before its collapse:
http://video.google.com/videoplay?do...54740145858863
&q=cameraplanet+9%2F11. The yellow color implies a molten-metal
temperature of approximately 1000 oC, evidently above that which the dark-
smoke hydrocarbon fires in the Towers could produce. If aluminum (e.g.,
from the plane) had melted, it would melt and flow away from the heat
source at its melting point of about 650 oC and thus would not reach the
yellow color observed for this molten metal. Thus, molten aluminum is in
fact ruled out with high probability. But molten iron with the
characteristics seen in this video is consistent with a thermite-reaction
attacking the steel columns in the Tower, thus weakening the building just
prior to its collapse, since thermite produces molten iron at yellow-to-
white hot temperatures. (As some of the molten metal hits the side of the
building in the video clip above, note that the white-hot interior is
exposed.) The reader may wish to compare the dripping molten metal
observed on the corner of the South Tower just before its collapse with the
dripping molten metal from known thermite reactions:
http://www.checktheevidence.com/911/Thermite2.htm