Recently, there was a post on 9/11 Blogger here with videos released by NIST. I took the video with the audible detonations and ran it through an audio editor as the audio was very low and only worked in the right channel (speaker) and had no left channel audio. I raised the audio and changed the stereo output to mono so that the audio can be heard in both speakers.

I then added some witness testimony to corroborate what we are hearing:

There absolutely can be no doubt about what the witnesses heard, and what we can see and hear in these collapse videos. It's time for an international investigation into 9/11.