governor. amtrak is implementing high tech security measures after osama bin laden's journals revealed plans to actually attack america's rail system. the head of amtrak's police force told congress they're now working with the tsa and other agencies to improve their security. he does say the system will remain free and open. the fbi is trying to track down vandals who nearly caused a train derailment in iowa. they say someone tampered with the switch box to sabotage a train. most likely one carrying flammable ethanol. a rail worker noticed something was wrong with the switcher and averted what could have been a deadly disaster. breaking news overnight from arizona. our phoenix station knxv reports officials have determined a campfire triggered the state's fiercest wildfire and there are two persons of interest. tuesday the so-called wallow fire became the biggest in state history. and after burning for two weeks,