Premiere Date: TBD 1X60 min. documentary, National GeographicSecret World of Fireworks (w.t.) explores the closely held secrets, recipes, and techniques from the world of pyrotechnic showmen. For the first time in this HD special, National Geographic takes a behind the scenes look into this exclusive world with unique access from Zambelli Internationale of New Castle, Pennsylvania – America's "First Family of Fireworks" – along with rocket scientists and chemists from Los Alamos, New Mexico.