Ecological Risk Grows As Deepwater Horizon Oil Rig Sinks In Gulf

A well 'blowout' from the sunken Transocean Deepwater Explorer oil rig is spewing 7,400 barrels of crude oil a day, and could threaten Gulf of Mexico ecology.An oil slick surrounds the burning Deepwater Horizon oil rig in the Gulf of Mexico on Wednesday. The rig sunk Thursday morning, and the escaping crude oil could cause an ecological disaster, say environmentalists.