My company's parent must have in excess of 1,000 people in upper floors of Two World Trade Center. Info is sketchy at this time on their status.

A very close colleague and personal friend was able to go from the 102nd floor of 2 WTC to the cross-over in the 70's after the first crash. There security tried to keep them from continuing down (I'm assuming via stairs), but most people ignored security. My friend was able to get out and contacted her husband.

There are many, many people I've known for years working in 2 WTC.