And it very likely is just a precaution, as Los Alamos is understandably a very secure facility. But that doesn't mean America's premier nuclear laboratory will be unaffected. Research there may have to be suspended if firefighters can't get a handle on the wildfire threatening the nearby town of Los Alamos. Many of the lab's 11,800 employed personnel live in the town, which has already been evacuated. If a large number of homes are destroyed, it could disrupt day-to-day operations at the lab for the foreseeable future.