clear if it's linked to those new 90 military advisors who have arrived in country, but we haven't seen this up until now, anderson. >> david, let's talk about drone strikes and air strikes. i mean, is that the solution in terms of military involvement, if there is going to be military involvement, which would be better, drone strikes, air strikes, would they work against this enemy? >> i think the use of solely air power and solely drone strikes as being the way to solve this problem to fight this war is really questionable. there is really no record of drones being effective and conventional military advance, a season territory and air power alone has proven historically not to be enough to be successful in contesting this kind of war. >> the way isis is fighting, david, it is relatively conventional. it seems like they are moving around in pickup trucks, which could be targeted.