Turning Point for Missile Defense

Rich Lowry:

Somewhere 130 miles above the Pacific Ocean, tumbling around the Earth at 17,000 mph, a disabled spy satellite met a fiery end late Wednesday night -- destroyed by a U.S. missile-defense interceptor.

The spectacular hit marks a definitive turn in the debate concerning missile defense, from whether it's technically possible to whether it's ethically desirable. Many of the same people who had argued for years that missile defense couldn't be done now will complain that it constitutes a nefarious "weaponizing of space."...