Anniversary of BP oil spill

Wednesday marks the one year anniversary of the BP oil spill.

11 people were killed in the explosion that caused the spill, and over 20 million gallons of oil was poured into the Gulf of Mexico.

The environmental and economic effects of the tragedy continue to linger today.

Some scientists say the Gulf is returning to its pre-spill conditions.

However, reports state that before the spill, the Gulf was already in ecological distress.