BEIJING (AP) -- Chinese weather specialists used chemicals to engineer Beijing's heaviest rainfall of the year, helping to relieve drought and rinse dust from China's capital, the official Xinhua News Agency reported Friday. Technicians with the Beijing Weather Modification Office fired seven rocket shells containing 163 cigarette-size sticks of silver iodide over the city's skies on Thursday, Xinhua said. The reaction that occurred brought as much as four-tenths of an inch of rain, the heaviest rainfall this year, helping to "alleviate drought, add soil moisture and remove dust from the air for better air quality," Xinhua said. Though unusual in...