The world’s two big nuclear militaries are in the same war now in Syria and, if not on opposite sides exactly, certainly not on the same side. A primary, if not the primary, goal of the United States in Syria is overthrowing the Syrian government. A primary, if not the primary, goal of Russia is maintaining the Syrian government. Hostilities are building in each nation toward the other. Republican candidates for president are trying to outdo a certain Democratic candidate for president in bellicosity toward Russia. Forces armed by the U.S. in Syria are eager to shoot down Russian planes. Russia and the U.S. and its allies are clearly unhappy about each other’s flights. Hillary Clinton wants a no-fly zone. Israeli and Russian planes have already come close to fighting. Israel has attacked the base Russia is using, or at least Russia says it has.