Workers squat beside a manganese mine dregs retaining pond in Fengyun Manganese Co., Ltd. in Huayuan County in central China's Hunan Province, April 11, 2010. One worker was killed and five are still missing after more than 400 cubic meters of manganese mine dregs overflowed from a mine dregs retaining pond at the company Saturday. The landslide happened when 35 workers were working to close down the pond. 29 were evacuated and 6 were buried. [Xinhua]