When President Xi Jinping commissioned the Fujian on November 5, China became only the second nation to have an aircraft carrier with an electromagnetic catapult system. It is also notable that, last month, two navy aircraft from the USS Nimitz crashed into the South China Sea.These events crystallise a strategic reality often obscured by aggregate force comparisons: the relevant naval balance is not between the 11 US aircraft carriers and China’s three, but between what the United States can...