I think its dumped jet fuel from a military aircraft. A massive fuel purge and given the right atmospheric conditions created a huge "ball" of fuel
that ignited and fell as a flaming mass. Maybe it was struck by Ioninc Lightning in the atmosphere due to the denisty differential of the fuel mass
and the surrounding air.
I doubt it was a contrail, even from a concord as the two pairs of engines are seperated under the wing by some distance. The fuel vapor/ice crystals
that form contrails exist for quite some length and would reflect the sunlight at a greater distance then exihbited in the photos. Added to that when
looking at the photos you can see a smaller single whisp trailing the main mass and then what appears to be a darker colored trail. Very much like a
smoke trail from a flaming object, the internal vortex contains hotter air particles, hence the glowing effect, while the outer air particle stream
begins to cool and "carbonize" creating the darker smoke appearance. Very inconsistant with a contrail where the entire vortex is at the same
realative temp and the visable appearance of the trail is due to condensation of vapor crystals in the air.
www.archives.gov...
This is a picture of an aircraft being shot down, now mind you it had some certain velocity prior to being shot down but you can see that the
fuel/fire stream clearly. If it was just a ball of fuel that was on fire it would have less of a confined shape and have a tendency to whisp in more
of a vertical/vertex direction of the falling mass.
[edit on 15-6-2004 by robertfenix]