The former Soviet Union had thousand of primitive Scud type rockets mated with quick and dirty nuclear warheads with technology from the 60s. It was done before and is still very much possible.
Duh.
As someone WHO’S ACTUALLY MATED A NUCLEAR WARHEAD TO A MISSILE BODY, I’m not questioning that.
But, again, it ain’t a “nuclear missile” if there isn’t a nuclear warhead on board.