Smoke billows from a controlled burn of spilled oil off the Louisiana coast in the Gulf of Mexico coast line June 13, 2010. Millions of gallons of oil have poured into the Gulf since an April 20 explosion on an offshore rig killed 11 workers and ruptured BP's deep-sea well. REUTERS/Sean Gardner (UNITED STATES - Tags: DISASTER BUSINESS ENVIRONMENT ENERGY IMAGES OF THE DAY)