9/11 was the world’s worst terrorist atrocity. Julian Fox intends to change that fact. The planning will take months. The attack will take just two minutes.9/11 had been four airliners, three buildings and 3,000 deaths. What Fox is planning will down 1300 airliners, devastate countless city centres and kill around half a million people.His method won’t require a single hijacker: just 23 lines of computer code.Sarah Green is an Aviation Risk Analyst in the Dept of Homeland Security. Her job isto out-think the terrorists: identify weaknesses in airline security arrangements, figure out how those weaknesses might be exploited and get protections in place before the terrorists get their chance.Neither knows the other exists, yet the two are locked into a race that only one of them can win.