If China's satellites and spies were working properly, there would have been a flood of unsettling intelligence flowing into the Beijing headquarters of the Chinese navy last week. A new class of U.S. superweapon had suddenly surfaced nearby. It was an Ohio-class submarine, which for decades carried only nuclear missiles targeted against the Soviet Union, and then Russia. But this one was different: for nearly three years, the U.S. Navy has been dispatching modified "boomers" to who knows where (they do travel underwater, after all). Four of the 18 ballistic-missile subs no longer carry nuclear-tipped Trident missiles. Instead, they hold up to 154 Tomahawk cruise missiles each, capable of hitting anything within 1,000 miles with non-nuclear warheads.