A civilian reported that smoke was billowing from the 88th floor of the new 1 World Trade Center building recently. Over 100 New York fire fighters responded to the call. That report was later said to be false, as any fire was from welders working on the building.
This was very lucky, because had there been any fire that high on the building, within an hour or two, all the steel would have disintegrated into dust, and the building would have disappeared into its own footprint in cold dust.
What a close call!