Here’s the Associated Press recap of the first day of the trial involving BP and the devastating Gulf oil spill of 2010 that killed 11 workers and released 172 million gallons of crude oil into the Gulf over three months, making it the worst offshore oil spill in U.S. history.

Quick recap of today’s proceedings: Justice Department attorney Mike Underhill charged that BP had a “culture of corporate recklessness” and put profits of ahead of safety. BP, meanwhile, said it made “errors in judgement,” the AP reports, but also blamed the owner of the drilling rig, Transocean Ltd., and Halliburton for shoddy cement work on the rig.  (Transocean already settled civil and criminal claims for $1.4 billion in January. Meanwhile, BP has  sued  Halliburton for clean-up costs.)

Here’s a timeline of relevant events from the Miami Herald, which starts on April 20, 2010, when an explosion on the Deepwater Horizon rig, it eventually sunk and the oil began to gush before the well could be capped.