Gee, why isn’t this a surprise: The trucking business whose tractor trailer struck a train in Nevada Friday, killing six people, had a list of prior safety violations. http://www.reuters.com/article/2011/06/27/us-amtrak-collision-idUSTRE75O1P620110627 In fact, John Davis Trucking, which is headquartered in Battle Mountain, Nev., had seven…