How and where else could this military cooperation grow? In baseball terms, Russian military cooperation with Iran or North Korea is like a major-league franchise sharing talent with a double-A team. Russian military cooperation with China would be the equivalent of the Yankees merging organizations with the Dodgers—two behemoths in their hemispheres creating a partnership to take on the world. US officials and military analysts are watching one area of potential Russian-Chinese cooperation with particular concern: submarine technology.

