CHARLESTON (AP) -- Hundreds of machine gun owners plan to meet at a remote, abandoned strip-mine site near Shinnston this weekend to shoot their weapons. ''We call it 'Thunder in the Hills,' '' said Frank Watson, the event's promoter. ''Basically, it's a chance for machine gun owners to spend three days shooting lead and shooting the bull.'' Billed as a ''shoot and show,'' the event is open to owners of all types of automatic firearms. Military buffs will get a chance to see everything from the British-made Lewis gun of World War I to the M-60 now used by the...