John Marke is writer/consultant, formerly the senior risk expert at Deloitte’s Federal Practice and an advisor to a Presidential candidate on terrorism. He is one of the country’s leading authorities on risk, complexity and resilience, and also contributes on asymmetrical warfare and transnational threats. His clients include The White House, DHS, USJFORCOM, USC’s Center for Risk & Economic Analysis of Terrorism, PriceWaterhouse, and Harvard University. John was a paratrooper and Marine before a disabling injury. He later served as a Naval Cryptologist and Intelligence Officer.