Warnings over Oroville Dam flood risk ignored?

Environmental activists and local government officials warned more than a decade ago about the risk of catastrophic flooding below a major Northern California dam -- the very scenario that threatened to unfold over the weekend, prompting evacuation orders for nearly 200,000 people.State and federal regulators dismissed those fears at the time, saying they were confident the hillside that helps hold back hundreds of billions of gallons of water was stable and did not need to be reinforced with co