NYT: S. Elizabeth Birnbaum, the former head of the Minerals Management Service who resigned under pressure a month after the blowout of BP`s well in the Gulf of Mexico, said Wednesday that the offshore drilling oversight agency needed a thorough overhaul of its regulations, inspection procedures and culture. Testifying publicly for the first time since her resignation, Ms. Birnbaum told the presidential panel investigating the accident that the minerals service — since reorganized and …