The Wright brothers and their fantastic journey to successful flight is an amazing story in and of itself but it does not end on December 17, 1903. The Wright brothers were not satisfied with merely proving that heavier than air, powered controlled flight could be done. Within the next seven years, they improved on their invention as they developed new machines with better design, efficiency and proven application. Their amazing story does not even end with these successes. It continues, in the 1920s, when a group of people began the first efforts to commemorate "the first successful human attempt in all history at power-driven airplane flight" and to establish a memorial to commemorate the brothers and their achievements. Their efforts eventually resulted in Wright Brothers National Memorial where over half a million people a year come to honor these men and their legacy.