After a flurry of legal activity, a miner who was fired from a California rare earth minerals operation after complaining about unsafe working conditions has been reinstated – temporarily. The Mine Safety and Health Administration (MSHA) says the employee, who spoke out about various safety issues at the mine, had refused to work on a sodium carbonate tank until the operator provided him with a material safety data sheet so he would know what to do in the event of overexposure.