We can't wait to find out if the missile carries a nuclear payload. We cannot afford to lose one American city. We cannot afford to see if North Korea's "test" is actually a nuclear electromagnetic pulse attack designed to cripple the country's electronic infrastructure. We can only rely on what has worked in the past deterrence. Overnight, and without any public debate, America's defense strategy has dramatically shifted. By not being clear with North Korea, by not stating unequivocally that a missile launch of any kind toward our country means total devastation for the enemy responsible, President Bush has left America vulnerable to all our enemies.