Just after dawn, on a rutted out dirt road west of Las Vegas, Nev., Bureau of Land Management Ranger Shane Nalen steers his four by four over a small hill.
"You never know what you're going to roll up on out here," he says, his dispatch radio squawking in the background.
A panoramic view of the rugged Nevada desert unfolds. But there's also something peculiar. The desert carpet is lit up with reflecting lights shimmering in the soft morning sun.