Cutter Charges in the North Tower...

[hack89]

19. Do you understand compression?

400,000 cubic feet of air per floor went to zero cubic feet in a fraction of a second. That would generate enormous pressure and heat.

As for the path:

1. many elevator shafts were "local" service and did no go all the way to the lobby.
2. what elevator doors were open on what floor when the collapse started?
3. the stairwells were another path
4. the HVAC ducting were another path


Again, where are all those executives talking about all that work done on the walls of their nice window offices? Thousands of charges were installed in total secrecy - yea right.