dr. arthur frank says the exposure is limited.nd the health risk minimal. >> obviously any amount of exposure to cancer causing agents is not desirable but we live in a world where everybody is exposed to cancer causing agents every day. >> that's no comfort to julie shapiro and her son teddy who say there are too many unanswered questions about crumb rubber they want more testing. >> we need to protect these kids. we need to rule out anything that could harm them. >> until then, the worries and the games will continue. >> stephanie stahl cbs3 "eyewitness news". >> we want to bring you up to speed once again on our breaking news. chopper 35 arrive over 52nd and master in west philadelphia where a philadelphia police officer was shot tonight. "eyewitness news" has learned from a police source that that officer is in stable condition now at penn presbyterian medical center. reportedly after suffering wound to the thigh. investigators are on the scene. they have recovered both a van they were looking for in connection with that shoot