It has now been more than 50 days since the BP oil spill began in the Gulf of Mexico, and there are still a million unanswered questions. How much oil is really out there? What will it take to bring it under control? When, if ever, will the wounds heal?
Here is a list of unknowns compiled by ABC News. You doubtless have many other questions, and we invite your comments below.
1. We don't know how much oil has escaped into the Gulf of Mexico.
How much is escaping daily? Is it 12,000-19,000...Full Story