A veteran Philadelphia firefighter has died after suffering a medical emergency while on duty with the engine company assigned to Philadelphia International Airport. Firefighter Michael Bernstein died at the hospital around 1:50 Wednesday morning after being found unresponsive while on duty at Engine 78, "C" Platoon at PHL, the fire department and fire union said. He was 46. Fellow firefighters found Bernstein and administered CPR after he failed to respond to an assignment in the terminal early Wednesday, Philadelphia Firefighters Union Local 22 said. Bernstein served at various fire companies over his 22-year career with the Philadelphia Fire Department. He is survived by a wife and three children. Mayor Jim Kenney remembered Bernstein as a dedicated public servant and ordered all City of Philadelphia flags to be flown at half-staff for the next 30 days.