Bozeman explosion shook homes and shops violently up to three blocks. Natural gas is the cause of the explosion that collapsed and destroys three buildings in downtown Bozeman, Montana this morning and authorities are evacuating residents spanning 2 blocks from the area. And because firefighters can't shut down the flow of the flammable gas, they just let it burn out.As of now nobody is injured and the area is not entirely searched. For more details visit Bozeman Daily Chronicle.