Gulf oil spill cleanup and response (41 images)

An aerial view of the Deepwater Horizon oil spill off the coast of Mobile, Alabama, was taken from a U.S. Coast Guard HC-144 Ocean Sentry aircraft on May 6, 2010. UPI/Michael B. Watkins/US Navy

Protesters gather outside the British Petroleum (BP) Amoco Corporation Government Affairs Office in Washington on May 12, 2010. They called for Congress to seize BP's assets to pay for the environmental disaster resulting from an oil spill following the April 20 explosion of the Deepwater Horizon oil rig. UPI/Alexis C. Glenn

Crews conduct overflights of controlled burns taking place in the Gulf of Mexico on May 19, 2010. During controlled burns, oil from the Deepwater Horizon incident is burned in an effort to reduce the amount of oil in the water. UPI/John Kepsimelis/U.S. Coast Guard

Operators co-pilot an ROV as the "Top Hat" containment dome as it is lowered to the main oil leak caused by the April 20 explosion of the Deepwater Horizon rig in an undated image released by British Petroleum (BP). UPI/BP