Visitors walk on the Skywalk at Grand Canyon West following the opening ceremony on the Hualapai Indian Reservation in Arizona 20 March 2007. The USD 30 million glass-bottomed walkway juts out 70 feet from the rim at an evelation of 4,000 feet above the Colorado River. The Hualapai tribe hopes this one-of-a-kind attraction will lure tourists to the remote area approximiately 2.5 hours from Las Vegas by car. AFP PHOTO / Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)