May 8th, 2017

Nine derailers, a piece of railroad equipment used to derail train cars for safety purposes in railyards have been stolen recently, sources said, citing the FBI's weekly intelligence bulletin.
The theft of these items is strange since they are of little use outside of the rail industry, according to the bulletin.
Railroads have been targeted in the past by terrorists, the bulletin said.
It specifically mentioned the Oct. 1995 derailment of an Amtrak train in Hyder, Ariz. In that incident, one person was killed and 78 were injured when parts of the track were sabotaged. The FBI located a derail 50 miles from Hyder.
http://abcnews.go.com/US/story?id=90646&page=1