There is no need to repeat here the dozens of reasons for skepticism that an antiballistic-missile system has much chance of shooting down a single enemy warhead. (For some of those reasons, click here.) If it can shoot down one warhead (a lucky roll of the dice), the bad guys can simply launch a second warhead—and there hasn't yet been even a rigged test involving multiple targets. Everything about the system is way too complicated—the software; the command-control network; the integration of early warning radars, target-acquisition sensors, and weapons-launch centers. Yes, landing on the moon was complicated, too (to use an example cited by many advocates), but that was child's play by comparison. For one thing, the moon landing was a one-sided enterprise. As the spacecraft approached the lunar surface, the moon didn't suddenly shift direction or turn into a mirage. By contrast, an enemy can easily load a missile with decoys, which can lure an interceptor to the wrong target. Also, the trip to the moon took days; if something went wrong, corrections could be made. The trip to an enemy warhead darting across the heavens at 15 times the speed of sound must be completed in a half-hour or less, everything must be automated (there's no time for human intervention), and nothing can go wrong at all.
But Wednesday's test tells us that we are a long, long way from having to discuss the system and its problems at this level of detail. We can't even count on the rocket getting out of its launch silo, much less the millions of minute operations that must follow. President Bush fielded a half-dozen antimissile missiles and called them "operational." But they're a ruse. The Pentagon's test director, Thomas Christie (a veteran missile engineer and lifelong civil servant who, alas, is retiring next month) has testified repeatedly that the program is not yet ready for deployment, not yet ready to be called "operational."