The National Transportation Safety Board says it appears drugs were NOT involved in deadly train wreck in Le Mars last month. A moving Union Pacific train crashed into a parked train, killing a conductor and a worker in a nearby van. N-T-S-B spokesman Phil Frame is working on the case. He says tests on the crewmen for drugs turned up negative. Frame says information from the train’s data recorder hasn’t been much help.He says they’re looking at other things that may’ve caused the wreck, such as mistakes in switching the trains. Frame says they hope to have more information on the wreck next month.