Tank cars loaded with crude oil head east at Hurricane, W. Va., on May 11, 2014. CSX, which operates the train from Chicago to Yorktown, Va., does not want state officials to share information about the shipments with the public. But the trains are difficult to miss, and it's relatively easy to identify the cargo by the red hazmat placards. Some states have decided the information is not exempt from open records laws and plan to release it. MCT