There'll be differences of opinion in just about every intelligence analysis that you make.
Prior to the passage of the Patriot Act, it was very difficult - often impossible - for us to share information with the Central Intelligence Agency, with NSA, with the other intelligence agencies, and likewise, for them to share information with us.
So there is a foreign intelligence purpose for every one of our FISA warrants.
In order to be successful against each of these threats, we have to have a presence overseas, work closely not only with our counterparts in the law enforcement community, but also with the intelligence community.