Efforts to contain leak after oil rig explosion continue
Authorities are in the air, monitoring the size and direction of the oil sheen in the Gulf of Mexico. They are also using underwater robotic equipment in an attempt to shut off the source of the leak.
The oil has been leaking at a rate of about 42,000 gallons a day. Workers are trying to prevent the oil from from reaching the delicate ecosystems of the Gulf Coast.
An explosion on the rig last week led to a massive fire and the sinking of the rig. 11 workers were not found. The search for them has been called off and they are presumed dead.