I wasn't in work that day, I work weekends. But one of the guys had the foresight to bring in a zoom lens that day, and got this beauty:

Taken from 22nd floor, about half a block away.

He's into photography and has a great eye for photos, as well as some expensive kit.

So when I got in on Friday, I asked about the Secret Service, and had they visited us. Yes, they had visited us, and asked that the blinds on the windows closest to the WTC site be kept down for the duration of the President's visit. My colleague took his photo through one of the other windows. I imagine that there would have been a lot of commotion if one of the 'down' blinds had been moved up during the President's visit. There were also snipers posted on some neighbouring vantage points.