U.S. Chemical Safety Board

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**FILE** Rafael Moure-Eraso (left), chairman of the U.S. Chemical Safety Board, speaks Jan. 5, 2012, in Nashville, Tenn., about a CSB report regarding three accidents over the first five months of 2011 at the Hoeganaes Corp. plant in Gallatin, Tenn. The report said Hoeganaes Corp. officials were aware that the iron dust it created could explode but did little to lessen the dangers. At right is Johnnie Banks, the U.S. Chemical Safety Board investigator-in-charge for the case. (Associated Press)