美国突发爆炸，19人或遇难

Group 1 - An explosion occurred at a military explosives factory in Humphreys County, Tennessee, on October 10, resulting in 19 people missing, who are presumed dead [1][2] - The factory is owned by "American Precision Energy Systems," established in 1980, which manufactures various high explosives and specialty products for the U.S. Department of Defense and the industrial market [2] - The explosion was described as "very destructive," completely destroying a building and causing vibrations felt 20 kilometers away [1] Group 2 - The Bureau of Alcohol, Tobacco, Firearms and Explosives has joined the investigation into the incident, and the Department of Defense has acknowledged the event and will conduct an investigation [2]