The aerial photo taken on May 28, 2008 shows a damaged dam at the Tangjiashan quake lake near Beichuan County in southwest China's Sichuan Province. The earthquake-induced lake is at risk of bursting and threatening thousands of people downstream. Some 30 excavators are working non-stop to dig a diversion channel to drain the lake, which is expected to be completed within 5 to 7 days if weather permits. A large number of residents in Mianyang City are prepared to be evacuated from their homes.

Chinese armed police try their best to do the work at the Tangjiashan quake lake near Beichuan County in southwest China's Sichuan Province, May 28, 2008. The earthquake-induced lake is at risk of bursting and threatens thousands of people downstream. Some 30 excavators are working non-stop to dig a diversion channel to drain the lake, which is expected to complete within 5 to 7 days if weather permits. A large number of residents in Mianyang City are prepared to evacuate.