Journalists wearing cloth booties over their shoes to protect the glass, are shown Tuesday, March, 20, 2007, as they look through the glass-bottomed Grand Canyon Skywalk located at Grand Canyon West's Eagle Point in Arizona. Native American leaders, a former astronaut and other visitors stepped gingerly beyond the Grand Canyon's rim, staring into the 4,000-foot chasm below during opening ceremonies.
(Photo: AP/Arizona Republic, R. Schumacher)
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