According to newly released documents, former BP chief Tony Hayward fought off accusations that he  tried to prop up the company's falling stock price by using his subordinates' daily media briefings
on the Gulf oil spill. The documents also show Hayward defending himself against accusations that BP failed to keep its promise to share its data on how much crude was spewing into the Gulf.  An attorney from Louisiana pointed to an email Hayward sent to an aide asking him to tell the media the stories were ridiculous.