his life during the attack, and i will always think of him >> thanew york stock exchange trader pete tuchman remembering 9/11 as the world pauses to mark the 20th anniversary, the u.s. intelligence service says there is a new and growing threat starting to emerge eamon javers is live at the white house with more. hi, eamon. >> reporter: hi, courtney, when intelligence experts look back on september 11th, they think of it as a failure most of all of imagination. collectively they simply couldn't imagine airplanes being used in suicide attacks and todaythey worry the same failure of imagination could be happening again. this time in cybersecurity i talked to retired admiral mike rogers this week he's the former head of the super secret national security agency and he told me why he's worried. >> it's fair to say the only limit broadly in cyber these days is the limits of the h imagination because there's almost no limit to what you can do >> and that's why in new york the nypd and others have established a new cyber command center to watch for new threats heading to new york. >> whether it's a