S1, E3: In 1941, Japan’s Mitsubishi A6M Zero seemed unstoppable, racking up victory after victory in the Pacific. But just a few years later, the premier fleet of dogfighters became relegated to the role of manned bombs on kamikaze missions. Explore the revelatory engineering design that made the Zero so quick, agile, and lethal. See how America responded by pitting muscle against agility, building bigger, faster, more rugged fighters that finally took control of the skies over the Pacific.