In these intros, I tend to riff off the ripples of news that regularly surround whatever subject an author might be focusing on. So when it comes to the U.S. military, if you happen to be writing about the Obama administration’s "pivot to Asia," really, no problem. Background pieces on that pile up daily. How could you resist, for instance, saying something about the U.S. refusal to send an aircraft carrier to China for a parade of Pacific fleets (after the Chinese refused to allow Japanese ships to participate)? It’s mean girls of the Pacific, no? Have an interest in the Ukrainian crisis? Piece of cake, top of the news any time – like those curious pro-Russian protestors in eastern Ukraine who tried to liberate an opera house in the city of Kharkiv, mistaking it for city hall, or the hints that U.S. troops might soon be stationed in former Soviet satellite states. Or, say, you’re writing about threats in cyberspace – couldn’t be simpler!