The World Trade Center's Steel Structure Was Buckling Before the Collapse
Police, Firemen and Civilians Saw Warning Signs of Collapse of the Twin Towers on September 11th 2001Before the collapse of either tower, evidence the structures of the WTC were failing was reported by Police, Firemen and civilians. As already mentioned, flying around outside the WTC, the NYPD helicopters reported "an inward bowing of the buildings' columns in the minutes before they collapsed." Inside WTC 1, New York City Fire Department's Assistant Chief Joseph Callan realized the building was in trouble even before the first building, building two, collapsed. Interviewed Nov. 2, 2001, Assistant Chief Callan told New York City Fire Marshal Michael Starace, "Approximately 40 minutes after I arrived in the lobby, I made a decision that the building was no longer safe. And that was based on the conditions in the lobby, large pieces of plaster falling, all the 20 foot high glass panels on the exterior of the lobby were breaking. There was obvious movement of the building, and that was the reason on the handy talky I gave the order for all Fire Department units to leave the north tower. Approximately ten minutes after that, we had a collapse of the south tower, and we were sort of blown up against the wall in the lobby of the north tower, and we gathered together those of us who were still able to."
Callan's warnings about the north tower, WTC 1, reached the Office of Emergency Management, OEM. Other people learned from OEM that the WTC buildings were going to collapse. EMT Richard Zarrillo was told to deliver the message. In an Oct 25, 2001 interview Zarrillo explianed, "I said the buildings are going to collapse; we need to evac everybody out. With a very confused look he said who told you that? I said I was just with John at OEM. OEM says the buildings are going to collapse; we need to get out. ... I said, listen, I was just at OEM. The message I was given was that the buildings are going to collapse; we need to get our people out. At that moment, this thunderous, rolling roar came down and that's when the building came down, the first tower came down." 9110161.PDF http://nistreview.org/histories.php
At 9:37, a civilian on the 106th floor of the South Tower reported to a 911 operator that a lower floor-the "90-something floor"-was collapsing. - "The 9/11 Commission Report" p304 Controlled Demolition Debunked