The south parameter of the Bucksnort fire burns near Helena, Mont., July 26.
Wildfires continue to threaten important archaeology sites.
On Thursday, some 1,800 workers had been ordered out of three buildings at the sprawling Idaho National Engineering and Environmental Laboratory, a nuclear research and storage facility. It was the third time this year that a fire has threatened one of the nation's nuclear facilities. But decreasing winds overnight quelled the flames, and by this morning only 50 firefighters were on the scene in eastern Idaho, putting out a few remaining hot spots. Workers were allowed back on the job today. Fire struck the Los Alamos National Laboratory in New Mexico in May and a huge fire swept across the Hanford nuclear reservation in southeastern Washington last month.