Defense: While America has stopped production of its stealth fighter, China prepares to challenge U.S. air supremacy in the Western Pacific with its own. China is on another Long March, one it hopes will lead to military supremacy over the U.S. at least in the Western Pacific. It is deploying a carrier-killing mobile missile, the Dong Feng 21D, and is expected to launch its first aircraft carrier this year, the refurbished ex-Soviet carrier Varyag. China is also conducting preflight tests on a fifth-generation stealth fighter expected to challenge the best the U.S. has to offer. Photographs reportedly showing China's J-20...