In-brief: is it ever the case that things happen that “nobody saw coming”? Our guest on this week’s podcast would say “no.” He is Richard Clarke, a former National Coordinator for Security, Infrastructure Protection and Counter-terrorism for the United States and a veteran of four administrations, from President Ronald Reagan through to President George W. Bush. We talk about modern-day Cassandras: people who are warning about looming catastrophes, mostly in vain.