The buck stops here.
Mercado/ Deepwater Horizon/Well site leader Bob Kaluza -- who held the position traditionally known as "company man" -- didn't show up after being listed as witnesses for Tuesday's hearing. Kaluza's lawyer said he was exercising his Fifth Amendment right against self-incrimination.
Tony Hayward the chief executive of oil giant BP, the leaseholder of the Deepwater Horizon oil rig that exploded April 20, 2010 is said to be negotiating his withdrawal.
