Shoreline erosion in Vietnam's Mekong Delta, caused by sand mining and hydropower dams threatens hundreds of thousands of people. The "rice bowl" delta region, where the Mekong empties into the South China Sea, is predicted to run out of sand in just over a decade, but losses to the riverbed are already devastating lives and harming the local economy. "I heard a big bang and everything was gone to the river," says Le Thi Hong Mai, as she describes how her home collapsed into the river one morning. "I burst into tears, I lost everything." IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES