Combine all ingredients in a heavy pot or dutch oven.
Cover and bake in a 300 degree oven for 6 hours.
Remove from oven and with 2 forks, completely shred all the meat.
Turn oven to broil.
Place toasted buns on a cookie sheet.
Top with meat and then a slice of cheese.
Place under broiler until cheese melts (watch closely) approx 2-3 minutes.