Here is a link to thread on Timebomb2000.com that contains 6 still shots that were captured from video posted at Florida Today site.

 

They show a chunk of insulation that broke off the external fuel tank, apparently of a size of a concrete block or larger, hitting a left wing at the bottom, and producing a huge cloud of the dust whose size was 1/3 to 1/2 of the size of the wing itself.

 

Video grabs by 'Rattlehead' as posted on message board Timebomb2000.com

 

http://www.timebomb2000.com/vb/showthread.php?s=459fa3f2b5f6b43a4c0073cf2a06 5b7f&threadid=57121

Video (Flash required) http://www.floridatoday.com/columbia/debrisvideo.htm

It was reported on NASA news conference yesterday that on the re-entry, during a period of several minutes, 8 thermal and pressure sensors at that area went down, off the scale, while the shuttle was still performing well.

 

Then the shuttle started to break apart.

 

The flight was doomed from the launch and NASA knew it. They cold do nothing about it.

 

At the same conference it was said that similar chunk of insulation broke off during the precedent launch. This they knew also.

 

IZAKOVIC http://www.deepspace4.com

 

 

Florida Today article on left wing investigation:

 

http://www.floridatoday.com/columbia/columbiastory2A42501A.htm