"Academics, environmentalists and federal investigators have accused the administration since the April spill of downplaying scientific findings, misrepresenting data and most recently misconstruing the opinions of experts it solicited. "Meanwhile, the owner of the rig that exploded in the Gulf of Mexico, Transocean Ltd., is renewing its argument that federal investigators are in danger of allowing the blowout preventer, a key piece of evidence, to corrode as it awaits forensic analysis. Testing had not begun as of last week, the company says, some two months after it was raised from the seafloor."