The U.S. states of Ohio and North Carolina both take credit for the Wright brothers and their world-changing inventions—Ohio because the brothers developed and built their design in Dayton, and North Carolina because Kitty Hawk was the site of the Wrights' first powered flight. With a spirit of friendly rivalry, Ohio adopted the slogan "Birthplace of Aviation" (later "Birthplace of Aviation Pioneers", recognizing not only the Wrights, but also astronauts John Glenn and Neil Armstrong, both Ohio natives). The slogan appears on Ohio license plates. North Carolina uses the slogan "First In Flight" on its license plates.