By observing birds, kites and the action of the wind at various speeds, and by making painstaking notes of their experiments, Orville and Wilbur Wright formulated the principles that make flight possible and put them to work. Their achievement was among the most outstanding in the history of invention. Author Henry Thomas tells the triumphant story-in language suitable for both young and old-of two men who dared to follow their imaginations on a seemingly impossible flight of fancy-and succeeded