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Officials inspect part of a CSX freight train that derailed alongside a parking lot overnight in Ellicott City, Md., Tuesday, Aug. 21, 2012. Authorities say the train, hauling coal from West Virginia to Maryland, derailed and fell from a bridge near Baltimore, killing two college students who were on the tracks. Howard County officials say 21 of the train's 80 cars flipped over around midnight Monday. (AP Photo/Patrick Semansky)

Officials inspect part of a CSX freight train that derailed alongside a parking lot overnight in Ellicott City, Md., Tuesday, Aug. 21, 2012. Authorities say the train, hauling coal from West Virginia to Maryland, derailed and fell from a bridge near Baltimore, killing two college students who were on the tracks. Howard County officials say 21 of the train's 80 cars flipped over around midnight Monday. (AP Photo/Patrick Semansky)

Teens killed in Md. train derailment

A CSX freight train derailed alongside a parking lot overnight in Ellicott City, Md., Tuesday, Aug. 21. Authorities say the train, hauling coal from West Virginia to Maryland, derailed and fell from a bridge near Baltimore, killing two college students who were on the tracks.