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The trains speed is even higher than the maximum speed of 70 miles per hour in the straightaway north of the crash site. deepening the mystery, the ntsb says the train inexplicably when from 60 to 82 miles per hour in two minutes before hitting the curve and jumping the track. >> for a train to be going 82 miles an hour around that curve is just a frightening thought. >> reporter: mechanical problem or human error? its still too early to tell. investigators say the train made nine stops before j...