California's Biggest Lake, More Toxic than Ever

In 1905, levees broke on the Colorado River, and the water flowed into the lowest point in the United States to become the Salton Sea. California's largest inland body of water has become a magnet for fish, migratory birds and tourists, but it's also a receptacle for agricultural water runoff. Now, the drought is making it smaller, leaving behind a dust-bowl of toxic chemicals. We hear more about this potential disaster and plans to avert it.