With an increase in visitors during Memphis in May, Memphis International Airport is issuing a sauce safety warning. Passengers aren’t allowed to have more than about three-and-a-half ounces of liquid in their carry-on bags. However, airport officials say during the four-day World Championship Barbecue Cooking Contest, some travelers try to head back home with bottles of sauce in their carry-on luggage. The 2019 World Championship Barbecue Cooking Contest gets underway today.