lol Well, within two klicks, anyway. Against a known tunel complex, though, it would be highly effective.
I hear rumors that there were quite a few Army folks with specific Crockett training.
Not sure if nuking the NV would have been as preferable then say nuking the idiots who tied our hands behind our backs.
My old boss, BG Miller, was one of the first artillerymen trained on the Davey Crocket before he was sent to Vietnam and Laos.