A remarkable U.S. Air Force documentary on how airborne radar was used for navigation and target location in bad weather or at night on B-29 missions over Japan in 1945. Very rare rare footage of radar in action on an actual Twentieth Air Force Boeing B-29 Super Fortress mission. The under reported, seemingly overnight, evolution of radar stations from building sized ground installations with massive antennae to compact units that could be carried even by small night fighters was one of the most amazing technological revolutions during the conflict. This film was so highly classified, it couldn't be shown to the American people until after the war was over. The host is versatile Academy Award winner Arthur Kennedy, who appeared in many training films during this period, including as a pilot the popular "How to Fly the B-17" series.