Halliburton destroyed computer tests after Deepwater Horizon , prosecutors say . Prosecutors charge a company manager as the company pleads guilty . The Deepwater Horizon blowout killed 11 rig workers and unleashed the biggest oil spill in U.S. history . The Deepwater Horizon blowout killed 11 and unleashed the worst U.S. oil spill . Comment:
Halliburton destroyed computer tests after Deepwater Horizon , prosecutors say . Prosecutors charge a company manager as the company pleads guilty . The Deepwater Horizon blowout killed 11 and unleashed the worst U.S. oil spill . Comment: