Article Photos: Federal regulators investigate Wibaux plant fire 1/1

This photo provided by Wibaux County Disaster and Emergency Services, shows an eastern Montana oil recycling facility destroyed by an explosion and a fire, which is still burning Monday, Dec. 31, 2012 two days after it began outside Wibaux, Mont. Three workers were injured in the explosion, but their conditions are not known. (AP Photo/Wibaux County Disaster and Emergency Services, Frank Datta)