Leak being downplayed?
One expert warns that the amount of oil spewing from a sunken rig in the Gulf of Mexico is still being underestimated.
There also are worries that even more could escape if the crippled drilling equipment erodes further.
Ian D. MacDonald, an oceanography professor at Florida State University, estimates that 8 million to 9 million gallons had spilled by April 28. That's about five times more than the Coast Guard has estimated.
BP's chief operating officer, Doug Suttles, says remote cameras show the flow of oil apparently hasn't changed since the leak was discovered after the rig sank. He says the flow cannot be measured and called estimates imprecise.