http://stream.publicbroadcasting.net/production/mp3/knau/local-knau-838388.mp3
For decades the Grand Canyon has lured countless adventurers on foot and by water. But it's also attracted explorers in the sky, from former fighter pilots to Charles Lindbergh. Commentator Scott Thybony says to get a full sense of the Canyon, you have to see it at least once from above.