WTC Firefighters Tape:
Explosions and Aftermath
The above wma file is edited from the 9/11 radio transmissions of North Brunswick Volunteer Fire/Ladder Company #3. The file begins with the collapse of the WTC 2, @3:23 there are three beeps - this signifies a ~20 minute tape edit, and time has moved on to the collapse of WTC 1.
Numerous explosions are reported by firefighters in the transmissions...
...maybe that's why the OEM issued a World Trade Center collapse warning.
Why were only a select few warned?
Listen to the firefighters transmissions and ask yourself that question.
9/11 Firefighters: Bombs and Explosions in the WTC
The 9/11 WTC Collapses: An Audio-Video Analysis
What Really Happened