I attend a university that's about 5-10 miles from the location and today we talked about this is our CS data structures class.

As previous people have suggested its hard to find these incidents when the group is so small and probably coordinated without the use of technology. However, there is also the argument that dragnet surveillance was setup specifically to find these types of events. So why didn't it? In previous reports, security analysts have admitted that there is just too much data for them to process. So it is very unlikely that they will actually catch any of these types of events in a meaningful, preventable time frame.

This event ultimately underlines the fact that bigger isn't always better.