An explosion at a Tennessee military munitions plant Friday left 19 people missing and feared dead, authorities said. Humphreys County Sheriff Chris Davis said it was one of the most devastating scenes he’s ever seen. He did not specify how many people were killed but referred to the 19 missing as “souls” and said officials were still speaking to family. The blast, which people reported hearing and feeling miles away, occurred at Accurate Energetic Systems in rural Tennessee. The company’s website says it makes and tests explosives at an eight-building facility that sprawls across wooded hills in the Bucksnort area,...