The fundamental challenge for laser weapons is that, unlike in science fiction where lasers fly like bullets, a laser weapon in the real world has to stay focused for a long time, burning through the target the way a child might use a magnifying glass on a beetle. For the kid, the insect is easily trapped. For the laser, it has to stay focused on a moving target while burning it. This burning need not destroy the missile completely. Instead, by targeting a stabilizing fin, the missile may simply be disabled.