What on earth could drive young Britons to go to Syria and join the militant Islamic State group? That’s the question at the heart of the powerful Channel 4 drama, The State. It follows four people who leave behind their lives in Britain and travel to the heart of IS-controlled territory in Syria. Its award-winning director, Peter Kosminsky, says we must understand the mindset of those who join and carry out horrific attacks both in the Middle East and in Europe.