Firefighters and EMS personnel work to extract a person posing as a driver from a vehicle as a Careflight helicopter lifts off with a "patient" during the mock crash at the Mercer County Fairgrounds on Tuesday.

  Several area EMS units, firefighters and law-enforcement officers hosted the event to illustrate the dangers of distracted and impaired driving as prom and graduation seasons approach. More than 1,200 juniors and seniors from all six Mercer County school districts attended.