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DUTCHESS COUNTY, N.Y. -- In the event of an unthinkable disaster with mass fatalities, weeklong training exercises are being held in Dutchess County.

The medical examiner's office and the department of emergency response hosted the third annual mass fatality training exercise Thursday. This week's scenario involves a tractor trailer carrying jet fuel to Stewart Airport headed west on Routes 55 and 44 over the Mid-Hudson Bridge. The driver loses control of the vehicle, crashes through the barrier, plummeting to the train tracks below, landing directly on a northbound Amtrak train before exploding.

"You never know if you have the ability to respond to something like this until it occurs or at least you tried. I'm confident Dutchess County and its regional partners are much better prepared as a result of this week long exercise here on campus," said Dutchess County Emergency Response Coordinator Dana Smith.

More than 200 people from across the country took part in the training.