A massive blast at a Tennessee explosives plant obliterated a building and left 18 people missing. Here’s what we know

Early Friday, a thundering blast at a military and industrial explosives plant reverberated across a tight-knit community in central Tennessee, razing an entire building on the plant’s sprawling campus and killing a still-unknown number of people.

​ Early Friday, a thundering blast at a military and industrial explosives plant reverberated across a tight-knit community in central Tennessee, razing an entire building on the plant’s sprawling campus and killing a still-unknown number of people. Read More Breaking News, Latest News and Videos | CNN