Piers Morgan: “Where are the 400 jihadis still in London? You’re the Mayor of this capital city, where are they?”
Mayor Khan: "I can’t follow 400 people"
Piers Morgan: "Why?... Why can’t you instruct the police, why can’t you say everyone of those people who’ve come back from a war zone, I want them followed?"
WATCH HERE: Awesome job by Piers