In Overton, David Bert visits a museum dedicated to preserving the artifacts of the Anasazi Indians who lived in Nevada over a thousand years ago. The Lost City Museum was built by the National Park Service to exhibit artifacts that were being excavated from Pueblo Grande de Nevada. These Anasazi Indian sites were being threatened by the waters of Lake Mead as it backed up behind the newly built Hoover Dam. Eventually, when the lake was filled to capacity, about five miles of sites had been inundated or undercut by the water.