A handout photo released on 03 May 2010 by Transocean shows the Transocean drillship Discoverer Enterprise as it prepares to conduct recovery operations for BP using a specially-built 'dome' at the sea floor of the Gulf of Mexico where thousands of barrels of oil have been escaping since an explosion and fire destroyed the Deepwater Horizon drilling platform on April 20. With the use of the dome and a connection system to the ship, it is hoped that workers will be able to siphon the leaking oil. EPA/TRANSOCEAN - HANDOUT EDITORIAL USE ONLY/NO SALES
A handout photo released on 03 May 2010 by Transocean shows the Transocean drillship Discoverer Enterprise as it prepares to conduct recovery operations for BP using a specially-built 'dome' at the sea floor of the Gulf of Mexico where thousands of barrels of oil have been escaping since an explosion and fire destroyed the Deepwater Horizon drilling platform on April 20. With the use of the dome and a connection system to the ship, it is hoped that workers will be able to siphon the leaking oil. EPA/TRANSOCEAN - HANDOUT EDITORIAL USE ONLY/NO SALES
Steel workers work on welding a Polution Containment Dome at Martin Terminal work site in Port Fourchon, Louisiana, USA, 03 May 2010. BP plans to use the Polution Containment Dome to help contain the leak at the bottom of the ocean floor caused by the Deepwater Horizon well exploded on 20 April leaving oil escaping into the water. EPA/LARRY W. SMITH
a steel worker cuts a piece of steel to be used on the Polution Containment Dome at Martin Terminal work site in Port Fourchon, Louisiana, USA, 03 May 2010. BP plans to use the Polution Containment Dome to help contain the leak at the bottom of the ocean floor caused by the Deepwater Horizon well exploded on 20 April leaving oil escaping into the water. EPA/LARRY W. SMITH
A steel worker work on welding a Polution Containment Dome at Martin Terminal work site in Port Fourchon, Louisiana, USA, 03 May 2010. BP plans to use the Polution Containment Dome to help contain the leak at the bottom of the ocean floor caused by the Deepwater Horizon well exploded on 20 April leaving oil escaping into the water. EPA/LARRY W. SMITH
Steel workers work on the top of the backup Polution Containment Dome at Martin Terminal work site in Port Fourchon, Louisiana, USA, 03 May 2010. BP plans to use the Polution Containment Dome to help contain the leak at the bottom of the ocean floor caused by the Deepwater Horizon well exploded on 20 April leaving oil escaping into the water. EPA/LARRY W. SMITH
Steel workers work on welding a Polution Containment Dome at Martin Terminal work site in Port Fourchon, Louisiana, USA, 03 May 2010. BP plans to use the Polution Containment Dome to help contain the leak at the bottom of the ocean floor caused by the Deepwater Horizon well exploded on 20 April leaving oil escaping into the water. EPA/LARRY W. SMITH
A steel worker works on welding a Polution Containment Dome at Martin Terminal work site in Port Fourchon, Louisiana, USA, 03 May 2010. BP plans to use the Polution Containment Dome to help contain the leak at the bottom of the ocean floor caused by the Deepwater Horizon well exploded on 20 April leaving oil escaping into the water. EPA/LARRY W. SMITH
Ducks perch on a dam in the marsh in Venice, Louisiana, USA 03 May 2010. Leaking oil from the Deepwater Horizon drilling rig in the Gulf of Mexico threatens the ecosystem of all states on the Gulf. The Deepwater Horizon well exploded on 20 April. EPA/PAUL BUCK
Birds perch on near marsh water in Venice, Louisiana, USA 03 May 2010. Leaking oil from the Deepwater Horizon drilling rig in the Gulf of Mexico threatens the ecosystem of all states on the Gulf. The Deepwater Horizon well exploded on 20 April. EPA/PAUL BUCK
A bird flies over marshes in Venice, Louisiana, USA 03 May 2010. Leaking oil from the Deepwater Horizon drilling rig in the Gulf of Mexico threatens the ecosystem of all states on the Gulf. The Deepwater Horizon well exploded on 20 April. EPA/PAUL BUCK
Alabama National Guardsmen assemble a barrier meant to block oil from the spill in the Gulf of Mexico on the beaches of Dauphin Island, Alabama, USA, on 04 May 2010. The barricades will be lined with a chemical that will harder the oil as it washes ashore. EPA/DAN ANDERSON
Venice Seafood Company workers inspect and pick out small crabs and debris from shrimp as its offloaded from a boat at the Venice Seafood Company in the Venice Marina in Venice, Louisiana, USA 04 May 2010. Fishing has been temporarily suspended in the waters affected by leaking oil from the Deepwater Horizon drilling rig in the Gulf of Mexico. The affected waters are from the mouth of the Mississippi River east to Pensacola, Florida. The waters to the west of the Mississippi River are still open to fishermen. The Deepwater Horizon well exploded on 20 April. EPA/PAUL BUCK
Alabama National Guardsmen Sergeant Kenith Procter (L), Sergeant James Clemmons (C), and Specialist Joseph Raines (R) assemble a barrier meant to block oil from the spill in the Gulf of Mexico on the beaches of Dauphin Island, Alabama USA, on 04 May 2010. The barricades will be lined with a chemical that will harder the oil as it washes ashore. EPA/DAN ANDERSON
Alabama National Guardsmen Sergeant James Clemmons (R) and Sergeant Kenith Procter (L) assemble a barrier meant to block oil from the spill in the Gulf of Mexico on the beaches of Dauphin Island, Alabama USA on 4 May 2010. The barricades will be lined with a chemical that will harder the oil as it washes ashore. EPA/DAN ANDERSON
