to the discretion of each state, but that authority is not absolute. States within the United States and other sovereign territories were once assumed to have the authority to regulate commerce with respect to alcohol traveling to, from, or through their jurisdictions. However, one state's ban on alcohol may not impede interstate commerce between states who permit it. The Supreme Court of the United States held in Granholm v. Heald (2005) that states do not have the power to regulate interstate shipments of alcoholic beverages. Therefore, it may be likely that municipal, county, or state legislation banning possession of alcoholic beverages by passengers of vehicles operating in interstate commerce (such as trains and interstate bus lines) would be unconstitutional if passengers on such vehicles were simply passing through the area. Following two 1972 raids on Amtrak trains in Kansas and Oklahoma, dry states at the time, the bars on trains passing through the two states closed for the duration of the transit, but the alcohol stayed on board. Prevalence A 2004 survey by the National Alcohol Beverage Control Association found that more than 500 municipalities in the United States are dry, including 83 in Alaska. Of Arkansas's 75 counties, 34 are dry. 36 of the 82 counties in Mississippi were dry or moist by the time that state repealed its alcoholic prohibition on January 1, 2021, the date it came into force, making all its counties "wet" by default and allowing alcohol sales unless they vote to become dry again through a referendum. In Florida, three of its 67 counties are dry, all of which are located in the northern part of the state, an area that has cultural ties to the Deep South. Moore County, Tennessee, the home county of Jack Daniel's, a major American producer of whiskey, is a dry county and so the product is not available at stores or restaurants within the county. The distillery, however, sells commemorative bottles of whiskey on site. Traveling to purchase alcohol A study in Kentucky suggested that residents of dry counties have to drive farther from their homes to consume alcohol, thus increasing impaired driving exposure, although it found that a similar proportion of crashes in wet and dry counties are alcohol-related. Other researchers have pointed to the same phenomenon. Winn and Giacopassi observed that residents of wet counties most likely have "shorter distances (to travel) between home and drinking