|Deterrence works, it worked during the cold war and will work against rogue nations. Iraq and North Korea understand if they use WMDs our policy is to turn their country into a sheet of glass. More likely WMDs will be used against us in a terrorist mode. Much easier to smuggle them in the country than to put them on a missle. Creating a missle defense system for this reason doesn't make sense. Maybe I'd buy it for theater force protection against conventional weapons but not for the reason Bush is proposing.