I always wondered what terrorism experts study to become terrorism experts. Well, in this case, at least we know. It is math. You need math skills to pontificate about terrorism, as in: one terrorist plus one terrorist equals two terrorists. This guy once in the 1980s was on the Newshour on PBS. While on the air, there was a claim of responsibility for some act by a group that used the name `Izz Ad-Din Al-Qassam. He was asked on the air whether he knew who Qassam is. Without a pause, he said: "Oh, yes. `Izz Ad-Din Al-Qassam is a close aide to George Habash." Angry Arab was watching. He finished watching having learned about terrorism expertise what he knew not before.