Carolina Pulled-Pork Sandwiches

In this recipe, a "dry rub" of brown sugar, pepper, paprika and salt flavors the meat before it is cooked, and a vinegary "mop" is brushed onto the pork to add more taste as it is smoked. Once cooked, the meat is "pulled," that is, shredded into slivers that are just the right size for piling onto a bun. The sandwich —drizzled with a bit of the vinegary sauce, which cuts the richness of the meat — is the ultimate in Carolina barbecue. Cook this in a smoker or a barbecue that has been converted to a smoker.