Global Power: Moscow launches four ICBMs in a large-scale nuclear drill as Chinese state media, brandishing detailed maps, show how Beijing's nuclear submarines can attack U.S. cities. We press "reset," they press "launch." In March 2009, Secretary of State Hillary Clinton presented Russian Foreign Minister Sergei Lavrov with a red "reset button" to symbolize improved ties. The era of confrontation when American presidents demanded the tearing down of walls was over. From now on, we would make nice. Fast-forward to 2012, when President Obama met with Dmitry Medvedev, Russia's then-president and now prime minister, at the Nuclear Security Summit in...