The Peanuts help the Wright Brothers set up their flyer for another test drive in hopes of beating their past records. One of the Peanuts explains to Charlie Brown how their first flight went and how they decided who would fly first. The Peanuts also explain how the Wright Brothers pilot their glider.
Chuck Yeager finally breaks the sound barrier while piloting an aircraft. The people on the ground initially believe that the sonic boom was Chuck crashing but soon realize that Chuck was successful in his attempt to break the sound barrier.