Video: Evidence of many explosions at WTC are well documented: Audio, video, and first-hand knowledge of such explosions are presented in this clip. However, this only scratches the surface. There are over 100 surviving members of the FDNY who claim to have heard/seen explosions all throughout the buildings. If over 300 firemen had not perished in the obviously unexpected collapse of the buildings, I'm sure the number of those providing testimony of this would surely be much higher.
