In past disasters, including Hurricane Katrina, the federal government was in charge. But this time, BP - the oil giant that owned the Deepwater Horizon oil rig - has been designated the “responsible party.” That’s led to concerns about the flow of information. How big is the Gulf oil spill? How safe are workers trying to plug the broken well in clouds of evaporating crude? BP is the primary source of information about those questions, but is it providing answers to the people who need to know?