Cashill makes the case for a missile, not necessarily a Navy missile. That's just one theory.
And terrorists don't have the kind of radar guided missiles necessary to blow a 747 out of the sky when it is at 15,000+ feet.
that is still a possibility - someone else's missile. could a terrorist missile with that range have been fired from a boat off the coast?
There were unexplained boats in the area -- other than US Navy. There are just too many independent witnesses for this to be explained away as the 'official' version says.
I don't know about a missile launched from the beach but I was a surface missile Fire Controlman. The closest ship was over a hundred miles away.
The aircraft was at 12k feet. You can't see an aircraft at that altitude on radar from that distance because of the curvature of the earth much less hit it with a missile.