The U.S. Chemical Safety and Hazard Investigation Board will investigate the explosion at Accurate Energetic Systems near Bucksnort that killed 16 people.
An explosion at a chemical plant in Mississippi causes an ammonia leak and forces nearby residents to evacuate.
In other news, nominees for EPA chemicals and enforcement chief advance in the Senate, and the White House pushes agencies to deregulate faster ...
The ATF has estimated that between 24,000 to 28,000 pounds of explosives detonated on the day of the incident.