More than 100,000 people have been evacuated in California after fears a dam spillway is in danger of collapsing. The Oroville dam is 770 feet high and it is the tallest one in the US.

The Army Corps of Engineers began testing the spillway Monday in the event of a partial opening later this week.

BEIJING, China (CNN)-- Authorities in southwestern China watched nervously Wednesday as rising water behind an earthquake-created dam neared a spillway ... area in "extreme danger," said Liu ...