By Michael Winter
 USA TODAY
 June 27, 2011

Authorities have ordered residents to evacuate as a wildfire threatens Los Alamos, N.M., home to the laboratory that developed the atomic bomb.

Update at 5:10 p.m. ET: In an interview with the Weekly Alibi, lab spokesman Kevin Roark said there are several metric tons of uranium, plutonium, americium and other nuclear materials among the facilities. He said these radioactive materials are kept in the most secure facilities - deep inside vaults within concrete and steel buildings.

Update at 5:24 p.m. ET: The fire has crossed onto lab property and jumped across State Route 4, New Mexico fire officials say. A one-acre spot fire was reported in Water Canyon, within Technical Area 49, on the lab’s southwestern boundary.

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