Sabotage may have caused an Amtrak train to derail in Arizona Monday morning. Two notes, from a group calling itself the "Sons of the Gestapo," said the tampering had been done in "retaliation for Waco and the siege of Ruby Ridge." One person was killed and 65 wounded as several cars left the tracks and fell 30 feet down a desert ravine 60 miles southwest of Phoenix. Engineers report seeing something on the tracks just before the accident. Local authorities say 29 rail spikes that fasten the track to the cross-ties had been removed from a 19-foot section of the track. Two men were briefly detained and questioned, but were cleared of any involvement in the incident.