Firefighters work to extinguish a wildfire near Bonnie Springs in the Red Rock National Conservation Area Tuesday morning, July 3, 2007. The 400-acre wildfire led authorities to close the 13-mile …

Firefighters work to extinguish a wildfire near Bonnie Springs in the Red Rock National Conservation Area Tuesday morning, July 3, 2007. The 400-acre wildfire led authorities to close the 13-mile ...

Firefighters work to extinguish a wildfire near Bonnie Springs in the Red Rock National Conservation Area Tuesday morning, July 3, 2007. The 400-acre wildfire led authorities to close the 13-mile Scenic Drive and the Red Rock Canyon Visitor Center. (Las Vegas Review-Journal file)