They could have simply been told, 'Enter the United States, learn how to fly these types of planes,' ... They may not have known ultimately where this was headed or what the goal was. Then as that became necessary, they could have been in communication with other members of other cells who would have given them other directions.

What we're seeing is an increase in the evolutionary pace of IED (improvised explosive device) design, ... It's increasing at a pace we previously haven't seen.

They would want people that could get into the country -- preferably legally, preferably people we weren't aware of. They don't have a history with the intelligence services of law enforcement.

[Develop a contingency plan.] We tell clients, 'Don't be so foolish as to believe you'll never be successfully hit,' ... Develop a plan, so when things do go sour, you're ready.

If you shut it down, it will be back in about five seconds in a million other locations.

We believe that this signifies this is a warning message, and they feel they're obligated (to give) in the run-up to an attack.

A lot of media attention is paid to how much Christmas shopping is done online. The effect is to call attention to those sites doing the largest dollar amounts of those sales. That becomes a motivating force for the entrepreneurial criminal.

The trick with all these attacks is, when does it rise to the level of being noteworthy?