An explosion at a Tennessee munitions factory on Friday obliterated the building, leaving 18 people missing and feared dead. The blast, felt for miles, has led to a major investigation by federal authorities.

• 18 people are missing and presumed dead after the explosion at Accurate Energetic Systems.
• Humphreys County Sheriff Chris Davis described the scene as "one of the most devastating situations that I’ve been on in my career," noting the building was "gone."
• The company, which develops and manufactures explosives for various markets, had a prior incident in 2014 that killed one person and injured three.