Nigeria, Sept. 11 -- A child born on September 11, 2001 is now 25 years old. Someone who was ten that morning is now 35. Someone who was 20 is now 45. An entire generation has grown up in a world in which airport security, terrorism alerts, mass surveillance, wars in Afghanistan and Iraq, the Patriot Act, Guantanamo, drone warfare and the language of "national security" were already part of the political landscape.



What did 9/11 teach a generation that never experienced the world before it?



That may be the most powerful measure of how much time has passed since the morning when four hijacked planes turned an ordinary Tuesday into one of the defining catastrophes of the modern age. Someone born that day has had enough time to fini...