After Beirut, Experts Warn Of 'Dangerous Gaps' In U.S. Oversight Of Ammonium Nitrate

The catastrophic explosion in Beirut, Lebanon last week has renewed calls here in the U.S. to strengthen oversight of ammonium nitrate or AN, a chemical compound used in some farm fertilizers.

Officials in Beirut believe the giant blast, which killed more than 200 people and damaged half of the city, was likely an accident caused by fire and negligent...