Edited sentence: A side-effect of this trend to automate radio stations, as opposed to signing off overnight, is that no one is there to warn people when disaster strikes.At that time, Clear Channel owned six of the nine radio stations in the Minot area.Beginning announcers used to get their training by working overnight and weekend hours.City officials attempted without success to reach the local Clear Channel office by telephone to spread the warning; it was several critical hours before the station manager was finally reached at his home.Clear Channel claimed no responsibility, and maintained that the city should have used the Emergency Alert System to trigger the automatic equipment at the station.Clear Channel was criticized for an incident that occurred in Minot, North Dakota, when a Canadian Pacific Railway train filled with toxic anhydrous ammonia derailed early on the morning of January 18, 2002.In this instance, however, the emergency alert system failed, leaving city officials with no recourse.Industry observers point out, however, that very few people affected by the accident would have been listening:.Many see the trend of voice-tracking as having harmful effects on the broadcast industry, especially in terms of employment and career development.When stations eliminate positions, that leaves fewer venues for prospective broadcasters