Associated Press: People who make a living from a natural gas drilling technique that involves pumping chemical-laced water into the earth and others who believe it has poisoned them or their well water packed into a hotel ballroom in southwestern Pennsylvania on Thursday night to make an impression on federal researchers. Residents of Hickory, about 15 miles southwest of Pittsburgh, called for intensive study of hydraulic fracturing, or fracking, and told a U.S. Environmental Protection Agency panel …