support isis. many of its oil fields have been hit by air strikes. what can be done, what can be come mrirnd, exactly, at this summit? >> in my fight against terrorists in the past, that's a critical factor. and it was interesting to me to read an article in the "new york times" just the other day indicating that isis is paying their fighters $300 a month versus $400 a month which they had previously. that tells me that they are having a great deal of challenge with run ago government, which is what they're attempting to do. paying their fighters, generating taxes, finding some kind of financial outlet. so that is the critical piece. if you take away the money from these organizations, they not only don't have the ability to fund their fighters, but they don't have the ability to buy weapons, do the interpret sweeps, do the kinds of things you're talking about with buying airline tickets and different types of explosive devices and different weapons.