The suicide bomb attacks in Brussels are unlikely to be the final operation mounted by the so-called Islamic State on European soil. France's President Hollande says Europe is now at war, so what are the most effective weapons at Europe's disposal? Dominic Grieve was the Attorney General in David Cameron's first term as British prime minister. He is now Chairman of the UK parliament's Intelligence and Security Committee. Can Europe be both secure and free?

From his Oscar winning score for The Lion King, through 12 Years A Slave to a series of superhero blockbusters, including the latest - Batman vs Superman - Hans Zimmer is, as one director put it, "quite simply the contemporary composer to work with". German born, British educated, he never received formal musical training and he's a champion of technology. Hardtalk's Shaun Ley asks Hans Zimmer whether the technology he so loves is killing the music makers?