An aircraft monitoring the area near Los Alamos where a huge wildfire has been burning has picked up no sign of unusual radiation levels.
New Mexico Gov. Susana Martinez announced Sunday that flights by a U.S. Environmental Protection Agency plane in the past week showed radiation levels are the same as they were before the fire.
The blaze raised concerns because it burned close to the Los Alamos Nuclear Laboratory. The lab was the site where the U.S. developed its first atomic bombs and still has large amounts of nuclear material.
Los Alamos and nearby communities were evacuated nearly a week ago as the wildfire approached. About 12,000 residents were allowed to go home Sunday.
Those with respiratory ailments should stay away because of smoke.