Officials from BP, formerly British Petroleum, will be back in a New Orleans courtroom next week. It's part of a complex federal case that will ultimately determine responsibility in damages for the worst environmental disaster in U.S. history. And that's the 2010 oil spill in the Gulf of Mexico. NPR's Debbie Elliott's been following the trial and joins us. Deb, thanks for being with us.
DEBBIE ELLIOTT, BYLINE: Glad to be here.
SIMON: Remind us of what's at stake in this phase of the case.