The National Park Service, already receiving criticism for a proposing to sharply increase entry fees, must now deal with Inspector General of the Interior Department for the proliferation of cell phone towers within the parks. The group Public Employees for Environmental Responsibility filed a complaint this week with the focus being on Yosemite. Their investigation, based on Park Service documents, claims park managers allowed the construction of mobile communication towers in violation of environmental laws and National Park Service rules. Vic Bedoian reports from Fresno.