Do we care about boost phase missile defense? Perhaps the topic is too esoteric. Or perhaps the perceptions that it is too hard to do successfully rule the day. Or, perhaps we do not appreciate how important being able to destroy attacking missiles early in flight really is. But the actions of the U.S. Congress and the Bush Administration leave open the question of whether the U.S. will ever deploy a defense capable of destroying attacking ballistic missiles while they are most vulnerable, thereby strengthening the entire defensive architecture for which so much time, energy, and resources have been expended.