Originally posted by: ProfJohn
Originally posted by: laFiera
?Loss of structural integrity was likely a result of weakening caused by fires on the 5th to 7th floors. The specifics of the fires in WTC 7 and how they caused the building to collapse remain unknown at this time. Although the total diesel fuel on the premises contained massive potential energy, the best hypothesis has only a low probability of occurrence. Further research, investigation, and analyses are needed to resolve this issue.?
However dont u find it interesting that the windsor building in madrid burned for 24 hours and it didnt collapse like building 7? How is that explained??? maybe the steel frame in building 7 wasn't of good quality?

Next time i hope they import them from Madrid! alright, outta here for the weekend....let me know other interesting points you got and ill take a look at them!
Here is a link to a great article going into the 9-11 myths in depth by Popular Mchanics.
http://www.popularmechanics.com/science/defense/1227842.html?page=4&c=y
FACT: Jet fuel burns at 800° to 1500°F, not hot enough to melt steel (2750°F). However, experts agree that for the towers to collapse, their steel frames didn't need to melt, they just had to lose some of their structural strength--and that required exposure to much less heat. "I have never seen melted steel in a building fire," says retired New York deputy fire chief Vincent Dunn, author of The Collapse Of Burning Buildings: A Guide To Fireground Safety. "But I've seen a lot of twisted, warped, bent and sagging steel. What happens is that the steel tries to expand at both ends, but when it can no longer expand, it sags and the surrounding concrete cracks."
"Steel loses about 50 percent of its strength at 1100°F," notes senior engineer Farid Alfawak-hiri of the American Institute of Steel Construction. "And at 1800° it is probably at less than 10 percent." NIST also believes that a great deal of the spray-on fireproofing insulation was likely knocked off the steel beams that were in the path of the crashing jets, leaving the metal more vulnerable to the heat....
NIST reports that pockets of fire hit 1832°F.
FACT: Many conspiracy theorists point to FEMA's preliminary report, which said there was relatively light damage to WTC 7 prior to its collapse. With the benefit of more time and resources, NIST researchers now support the working hypothesis that WTC 7 was far more compromised by falling debris than the FEMA report indicated. "The most important thing we found was that there was, in fact, physical damage to the south face of building 7," NIST's Sunder tells PM. "On about a third of the face to the center and to the bottom--approximately 10 stories--about 25 percent of the depth of the building was scooped out." NIST also discovered previously undocumented damage to WTC 7's upper stories and its southwest corner.
But NIST's analysis
suggests the fall of WTC 7 was an example of "progressive collapse," a process in which the failure of parts of a structure ultimately creates strains that cause the entire building to come down.
Videos of the fall of WTC 7 show cracks, or "kinks," in the building's facade just before the two penthouses disappeared into the structure, one after the other. The entire building fell in on itself, with the slumping east side of the structure pulling down the west side in a diagonal collapse.
Ray I hope that answers some of your questions.
Larry Silversteen "pull it" video
http://youtube.com/watch?v=u0scE7bQWdk
WTC 7 falling down. You can see the penthouse falling into the buidling.
http://youtube.com/watch?v=tr6_WRPZjIM
I have watched a dozen videos of WTC 7 and in all of them you can clearly see that it falls from the bottom up, while the other two start falling at the top and "pancake"
That being said, would some conspiracy believer explain to me the need to bring down WTC 7, wasn't the destruction of the two towers enough?? I can't see someone sitting there and thinking "we are going to destroy the 2 World Trade Center towers so we can launch a war to get oil, and just incase that isn't enough lets destroy WTC 7 as well, that will really piss them off."
Edit: Check out this picture of the coner of WTC 7, look at the hunk of it that is missing. It seems that there is no really good pictures of the entire building taken after the fall of the two towers.
http://www.kolumbus.fi/av.caesar/wtc/wtc7_2.jpg