The Los Angeles County Board of Supervisors today split 3-to-2 in favor of state regulation of "fracking," the controversial oil and natural gas mining process known as hydraulic fracturing. Environmentalists support regulation sponsored by State Senator Fran Pavley that would study the process, which includes pumping an unknown mix of chemicals at high pressure into wells to crack rock formations and release trapped oil and gas deposits. Conservative members of the Los Angeles Board of Supervisors opposed the regulation. Pacifica's Dan Fritz reports from Los Angeles.