In the dense jungles of Cambodia lie the mysterious ruins of Angkor. Once the hub of a thriving civilization, Angkor may have been home to more than a million people. Archaeologists have studied the site on the ground and through aerial and satellite photos. Still there are secrets. That's why researchers were so excited last year when an imaging instrument flown on space shuttle Endeavor penetrated the dense jungle to reveal new features on the surface. Keith Eirinberg from the Center for Strategic and International Studies is featured.
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