President Obama is cutting missile defense spending by over $1 billion. This makes no sense at the same time that North Korea is testing nuclear weapons and ballistic missiles to deliver them andwhen Iran may be just one year away from producing its firstnuclear weapon. Washington's reluctance to pursue missile defensemakes little sense because Americans overwhelmingly support missiledefense. The problem is that too many of us still think we alreadyhave all we need. We don't.