The story behind the courageous Dam Busters, who crippled the Nazi war machine by skimming Ruhr Valley rivers. When imprecise Allied bomber attacks targeting Nazi weapons factories killed many nearby civilians but KOed few factories, in 1943, after years of development, a brilliant British engineer, Barnes Wallis, managed to design a new type of large aerodynamic bouncing bombs which thanks to a special allied bomber unit specifically trained in secrecy for this suicide mission blew up key massive Nazi dams, disrupting the hydro-electric power feeding the nearby munitions plants, and flooding factories.
—David Stevens