Adam Gertler is tracking down the coolest frozen confections in the country. Find out how the people of New Orleans beat the heat with Snowballs - colorful shaved ice in wild flavors like Bananas Foster and strawberry cheesecake. Discover a gelato shop in Chapel Hill, North Carolina, with a full bar that shakes and stirs gelato martinis. In Nashville, Tennessee, two sisters make Mexican ice pops in flavors you won't find in the frozen food aisle. And visit the Dippin' Dots factory in Paducah, Kentucky, where they make billions of their famous ice cream beads with the help of liquid nitrogen.