Holes in the Missile Shield

despite the more than $80 billion spent by the U.S. on missile defense since 1985, this system will not provide significant protection for many years, if ever. The political pressure to claim that the U.S. is secure against a rogue nation's attack has led to a defense that will not counter even the earliest threats from the emerging missile powers. The MDA's midcourse system is built to intercept long-range missiles fired thousands of kilometers from the U.S.; it can do nothing to stop a short- or medium-range missile launched from a ship off America's coasts. What is more, the interceptor rockets would most likely prove inadequate against long-range missiles as well, because an enemy could easily equip its ICBMs with fundamentally simple and highly effective countermeasures. [from Scientific American]