Bestselling author Bob Shepherd is a security advisor and 20-year veteran of Britain's elite Special Air Service. With more than a decade and a half of private security work to his credit, he has successfully negotiated some of the most dangerous places on earth as both an SAS soldier and private citizen. Shepherd is a regular media commentator on security issues and has appeared on CNN International, BBC One, BBC World, BBC Radio and SKY News. He also shares his insights on security politics through his blog.