Activists protest in front of the Hale Boggs Federal Building on the first day of the trial over the Deepwater Horizon oil rig spill in New Orleans, Louisiana February 25, 2013. Nearly three years after a deepwater well rupture killed 11 men, sank a rig and spewed 4 million barrels of oil into the Gulf of Mexico, BP and the other companies involved are about to face their day in court. REUTERS/Jonathan Bachman (UNITED STATES - Tags: SCIENCE TECHNOLOGY ENVIRONMENT CRIME LAW BUSINESS)