Missoula’s Great Montana Shake – Out Is Wednesday at 10:21 A. M. [YouTube]Missoula’s Great Montana Shake – Out Is Wednesday at 10:21 A. M. [YouTube]While California conducted their statewide earthquake drill last week, Missoula County Public Schools will have their Great Montana Shake-Out on Wednesday at 10:21 a.m.Peter ChristianPeter Christian