The Investigation Into What Happened At Holston Army Ammunition Is In The Preliminary Stages With The Bureau Of Alcohol, Tobacco And Firearms Taking The Lead. The Fire Started In A Building Containing Explosives, Plant Firefighters Decided It Was Safest To Let The Fire Burn Itself Out, And A Few Hours Later A Powerful Explosion Was Felt And Heard Throughout The Area. One Worker Was Taken To Hospital After Inhaling Smoke. It Could Take Several Weeks To Determine The Cause Of The Fire And Get Damage Estimates.