BETHLEHEM, Pa. - Emergency responders converged on a local college campus Thursday to prepare for a worst case scenario.

Lehigh University held an active-shooter drill.

Dozens of officers from the school and the Bethlehem Police Department took part in the exercise, along with EMTs and Bethlehem firefighters.

The drill is designed to help crews hash out problems now so they can save as many lives as possible in a real-life emergency situation.

"How we work, how we would respond, how we communicate together, get on the same page, use the same language, so that when an emergency happens, we're not trying to figure out those details," said Chief Jason Schiffer with the Lehigh University Police Department.

Thursday's exercise was part of a three-day training course.