The U.S. Chemical Safety and Hazard Investigation Board is deploying investigators to Tennessee this week, now that federal ATF teams have completed much of their work at a military explosives plant that blew up Oct. 10 and killed 16 people. …


The U.S. Chemical Safety and Hazard Investigation Board is deploying investigators to Tennessee this week, now that federal ATF teams have completed much of their work at a military explosives plant that blew up Oct. 10 and killed 16 people. …