I would say in just about every investigation we have, there will be differences of opinion, where you have partial facts, as to what those facts mean.

In the future, the cyber threat will equal or even eclipse the terrorist threat.

In the context of September 11, there were so many that lost their lives that - how do you single out one person? There were so many acts of heroism that day from so many people, whether it be firemen and police officers in New York and our agents also.

We cannot go up on a wire. We cannot do a search without a judge on the FISA Court approving it and determining that we have met the standard that has been set forth by Congress in order to utilize these techniques.

In planning an attack, persons have various roles.

I think around the world, our agents are the best collectors of information you'll find.

The 19 hijackers that came over here to commit the attack on Sept. 11, there were those that were at the bottom of the line. There were those who were the principal conspirators. There were those who were the pilot. Everybody has a role.