A parade of more than 50 ambulances, representing more than 20,000 paramedics, EMTs, and 911 dispatchers, traveled from UMass Medical Center in Worcester to the warning track inside Fenway Park on Wednesday, May 20. The Boston Red Sox, Mayor Marty Walsh, and Governor Baker joined celebrities and leaders in the healthcare community, the Massachusetts Ambulance Association and Municipal Ambulance Providers in celebrating EMS front line heroes during National EMS Week.