PRESS PHOTO BY JIM MARSHCoached by Macungie Ambulance Corps instructor Brian Wasserman, of Macungie, Darlene Knowles, left, of Macungie, and Iwona Seller, of Lower Macungie Township, practice their CPR technique on mannequins at a recent CPR class sponsored by the ambulance corps at the Lower Macungie Township Community Center along Brookside Road in the township.