* The seven fastest-growing cities in the world. Also, what if we were wrong about population growth?
* Marc Lynch on the aftermath of the Libya intervention.
* New York City has a 'reality check' on teaching sex ed.
* Michael Scherer on learning the lessons of Occupy Oakland.
* Michael Crowley on why Perry needs the evangelical vote.
* Crazy: the future of farming in metal pods.
* Spielberg says to blame Lucas for the latest Indiana Jones movie.
* Reclaiming the NC-17 rating.