AdvertisementInvestigators Find Slew Of Problems At Oil RigMay 12, 2010NPR Staff and WiresfacebookEmailIn this handout from BP, the main oil leak at the end of the riser pipe is seen underwater in the Gulf of Mexico. An estimated 1,000-5,000 barrels of oil a day are leaking into the Gulf after the Deepwater Horizon oil platform sank off the coast of Louisiana. (BP/Getty Images)