An explosion of flammable metal dust burned Wiley Sherburne, 42, an electrician at the Gallatin, Tenn., plant of the Hoeganaes Corp. Dust was everywhere at the plant. Sherburne died two days after being burned over 95 percent of his body. Combustible dust has killed or injured at least 900 U.S. workers in the past three decades, but the Occupational Safety and Health Administration has bogged down on efforts to strengthen regulations.

Chris Hamby reports for iWatch News (Center for Public Integrity) May 29, 2012. [2]