ivan talked about general al douri being killed. this was an individual who we began to look for when i was in iraq in 2007 and 2008. he was on the original deck of card, and he was one of the few people who were not captured. we always suspected he was in kirkuk and the isis state coming out of mosul. so, all of these things are starting to fit together. isis has continually gotten stronger in this sector. >> now, let's move quickly to australia. police there have arrested five people in a counterterrorism operation. one teenager apparently charged. and authorities say the suspects are individuals acts by themselves. not representatives, say a religious, cultural or national group. give me a sense how big a threat, lone wolf attacks are particularly there?