1. NUCLEAR WASTE:
Could the answer to the Yucca Mountain debacle lurk under a N.M. desert?
IN THE CHIHUAHUA DESERT, N.M. -- Bobby St. John is leading a tour of catacombs carved into a salt formation by the Department of Energy when his helmet lamp shines on the last thing you'd expect in one of the Earth's driest places. Water. Welcome to DOE's Waste Isolation Pilot Plant, a gift left when seas receded 250 million years ago.