BP’s latest failure to plug the leaking oil well in the Gulf of Mexico is one more crushing disappointment to Louisiana’s beleaguered people, one more strike against the company and one more signal to President Obama to redouble efforts to contain and clean the spill.

BP now pins its hopes — and those of the country — on yet another containment strategy, its fifth since the April 20 explosion. It does so amid mounting public anger and a report in The Times on Sunday that the company may have violated its own safety standards by ignoring warnings about design flaws in the well.

These disclosures add to the growing list of questions that must be addressed by the special commission President Obama has appointed to examine the root causes of the spill and recommend ways to prevent future catastrophes.

Here are others:

WHAT HAPPENED, AND WHY Five weeks after the blowout, there is no clear picture of the fatal sequence of events. Gas somehow escaped up the well, then exploded, collapsing the rig. The blowout preventer — a giant set of valves on the ocean floor — failed to work, and oil began spurting into the gulf at a rate recently estimated at 12,000 to 19,000 barrels a day. The total spill now exceeds the estimated 250,000 barrels that leaked from the stricken tanker Exxon Valdez in 1989. The public needs to get an honest accounting of the spill’s size, and BP’s word is not enough since it has to pay for the cleanup.

A joint Interior Department-Coast Guard investigative committee in Louisiana, and numerous Congressional panels, have been seeking clarity. Their search has not been helped by industry grandstanding and finger-pointing, with BP blaming the rig operator, Transocean, for the faulty blowout preventer.

It is also unclear which company was calling the shots on the rig, and there have been ominous suggestions that BP short-circuited standard drilling procedures to cut costs.

THE RESPONSE The questions about whether BP and the government responded quickly enough, and with the right weapons, could fill a book — and probably will. Both parties seem to have underestimated the size of the spill, and neither had a coherent underwater response plan in place. Though the oil industry had experienced blowouts at shallower depths, BP’s disjointed response suggested it had given little thought to the possibility of a blowout at 5,000 feet.

Partly as a result of laws passed after the Exxon Valdez, industry and the Coast Guard were better prepared to deal with the oil when it hit the surface. But the techniques — the controlled burns, the skimmers, the booms, the dispersants — were little more sophisticated than they were in 1989. Why no progress? And why was there only one dispersant available (and a toxic one at that) made by one company, Nalco?

REGULATORY FAILURE Much has been said — including by President Obama — about the incestuous relationship between the oil industry and its chief regulator, the Interior Department’s Minerals Management Service, which routinely ignored basic environmental laws and its own rules to fast track drilling permits.

But while these were terrible failures, and Interior Secretary Ken Salazar’s promise to reform the agency is overdue, it is hard to believe that other agencies in Washington, and even the Congressional oversight committees, were not also culpable.

NEW WEAPONS One outside-the-box question that looms large is whether the federal government should now develop its own capacity to deal with a huge blowout. As things stand now, industry has all the equipment and experience. In an interim report to the president on Thursday, Mr. Salazar suggested the creation of a kind of parallel technological universe in which government would have the robots, the coffer dams and the other tools necessary to help control a big blowout.

That could be expensive, but Mr. Obama indicated on Friday that he had been thinking along the same lines. As well he should be. The images from the last month — Washington essentially powerless, BP flailing away — have been deeply disheartening.

http://www.nytimes.com/2010/05/31/opinion/31mon1.html?pagewanted=print