The kids filling the room in the above picture are computer hackers. They work their way into computer systems much the same way some might hear about bad guys doing it on the news.
The difference is that these hackers are actually the good guys, and the systems they're breaking into are simulated as part of a competition for the eighth Cyber Security Awareness Week at the Polytechnic Institute of New York University.

The link for this article located at NY1 is no longer available.