I'm also skeptical about the targeting side of these "wonder-weapons". Going really fast against, say, an aircraft carrier, is almost more of a liability if you

I'm also skeptical about the targeting side of these "wonder-weapons". Going really fast against, say, an aircraft carrier, is almost more of a liability if you don't already know exactly where it is and how fast it's going pretty much before you launch at all - you don't have much time to detect it and change course to actually hit it, plus reduced ability to detect things through all of the air resistance heat you're generating.