This post has nothing to do with kilts except that I would like to think that there may be a few in the crowd in this pic.
I found this very interesting and thought some of you might also.
This picture was taken with a camera 70,000 x 30,000 pixels (2100 MegaPixels).

It can identify a face in any size crowd

The cameras are not sold to the public and are being installed in strategic locations. (This one is in Canada )

Place the cursor in the multitude of people and double click a couple times.
It will continue to show the people much closer when you double click again or click more if needed.

http://www.gigapixel.com/image/gigapan-canucks-g7.html