Deepwater Horizon oil spill threatens Louisiana Gulf coast

5 May: A picture released by Greenpeace shows oil leaking from the Deepwater Horizon starting to reach the Chandeleur Islands
Photograph: Daniel Beltra/Greenpeace/EPA

May 4: Oil blobs and sheen are seen in the waters of Chandeleur Sound
Photograph: Eric Gay/AP

May 4: Crude oil streaks on the surface of the Gulf of Mexico, several miles from where the Deepwater Horizon oil rig blew up and sank off the coast of Louisiana
Photograph: Scott Keeler/AP

Bird rescuers Danene Birtell (left) and Heather Nevill hold a brown pelican, found covered in crude oil on Storm Island in the Gulf of Mexico
Photograph: Paul Buck/EPA

May 4: Fishermen load oil booms in Drum Bay, Louisiana, as oil leaking from the Deepwater Horizon continues to spread in the Gulf of Mexico
Photograph: Carlos Barria/Reuters

May 4: An emergency response boat is loaded with protective boom as it heads to sea from Venice
Photograph: Alex Brandon/AP

The crew of the Poppa John motor vessel train to deploy fire-resistant oil containment booms off the coast of Louisiana
Photograph: U.S. Coast Guard/Rex Features

May 4: Men clean a beach in Biloxi, Mississippi, as oil from the Deepwater Horizon begins to come ashore
Photograph: Stan Honda/AFP/Getty Images

May 4: A dead shark on a beach in Ship Island, Mississippi. Concern is growing about the impact the oil spill will have on wildlife
Photograph: Joe Raedle/Getty Images

May 4: David Nagel, the executive vice-president of BP America, answers questions as he arrives for a closed briefing on Capitol Hill
Photograph: Alex Wong/Getty Images

May 4: A pelican sits on its nest with protective boom nearby
Photograph: Alex Brandon/AP

May 4: Oil retention booms lie near the nests of young brown pelicans on New Harbor Island in the Gulf of Mexico, May 4 2010. A few hours later, commercial fisherman hired by BP repaired the tangled booms
Photograph: Dave Martin/AP

May 4 Birds fly over Breton Island, in the Gulf of Mexico off the coast of Louisiana
Photograph: Gerald Herbert/AP

May 3: Jeremiah Pierron, crabber from Houma, Louisiana, sorts crabs while working the waters near Chauvin. Fishermen are worried about the chances of fishing being shut doen because of the oil spill
Photograph: Larry W. Smith/EPA