Building Seven

On February 13, 2005 a fire broke out in the 32 story Windsor building.  Fire burned in excess of 800 degrees Celsius for two days.  This steel structure building, and others like it, barring the Twin Towers and Building Seven, withstood the damage and did not collapse into piles of rubble.

The top six floors collapsed onto the rest of the building, but the steel core remained and thus held the building up. 

Connection to building seven?  An aircraft neither hit building seven, nor had the accelerant (jet fuel) that some claim was the demise to the Twin Towers.  Building seven just had a couple smaller fires that brought the building down by the end of the first day.