CNN's Thanksgiving marathon

CNN is rerunning six of its most popular documentaries on Thanksgiving Day, starting at 1 p.m. They include Growing Up Diana, on the childhood of Princess Diana; James Brown -- Say it Proud, on the Godfather of Soul; Fed Up: America’s Killer Diet, on why we keep eating food that's bad for us; Chasing Life, on the longevity industry's various potions and exercise regimens; Larry King -- 50 Years of Pop Culture, a celebration of the network's top host; and Danger: Poisoned Food, on how tainted products enter the food supply.