Next 9/11 shock might be being planned where we're not looking, UK's MI5 chief says

On the 25th anniversary of 9/11, MI5’s director warns against preparing only for past threats — the next strategic shock will look different and could already be forming where agencies aren’t looking.
He says al Qaeda remnants and similar militants still pose mass-casualty risks, as shown by a recent foiled plot in Manchester.
Rising state-backed aggression and cyber sabotage mean governments, businesses and academia must work together to find and fix vulnerabilities.