Put online by the Washington Post, you can pan and zoom to your heart's content until you find your nearest and dearest. Then, you can use Facebook to tag 'em. Clearly, as the Post points out, the tags aren't verified—that would take aaaages—but it's a fun idea nonetheless.
Depending on which part of the image you focus on, scanning the pixels is like a who's who of poitics, the media... or an anonymous-looking crowd. Either way, take a look for your buddies that made it along. [Washington Post]