Chastened by heavy criticism from lawmakers, a grim-faced BP chief executive Tony Hayward said Thursday he was "deeply sorry" for his company's catastrophic oil spill in the Gulf of Mexico.

"I understand the seriousness of the situation, the frustrations and fears that continue to be voiced," he told a House investigations subcommittee.

But before testifying, Hayward had to endure more than an hour of mostly unrelenting criticism from Democrats and Republicans alike.

"We are not small people, but we wish to get our lives back," Rep. Bart Stupak, D-Mich., the panel's chairman, told Hayward, throwing back at the oil giant comments made the day before by BP Chairman Carl-Henric Svanberg — about how BP sympathized with the "small people" of the Gulf — and Hayward's earlier remark that he wanted his "life back."

In a sharp exchange, Stupak noted that over the past five years, 26 had died and 700 were injured in BP accidents — including the Gulf spill, a pipeline spill in Alaska and a refinery explosion in Texas. He asked Hayward whether the government should ban drilling by companies with such "poor safety records?"

Hayward insisted that safety had always been his top priority and "that is why I am so devastated with this accident." When he became CEO, Hayward said he would focus "like a laser" on safety, a phrase he repeated on Thursday.

Lehman Brothers Holdings Inc.’s ex- Chief Executive Officer Richard Fuld asked a judge to dismiss a lawsuit accusing him and his colleagues of failing to disclose Repo 105, a financing method allegedly used to conceal billions of dollars of debt, according to court records.

Separately, Ernst & Young LLP, the Lehman auditor, also asked the judge to dismiss the lawsuit in a court filing June 4, saying its work met all applicable professional standards.

The class-action lawsuit, based on a 2,200-page report by Lehman bankruptcy examiner Anton Valukas, was filed April 23 on behalf of retirement funds including the Alameda County Employees’ Retirement Association in Oakland, California, and the Government of Guam Retirement Fund.

The Lehman executives denied in court papers that the investors had lost money on Lehman securities because of misstatements and omissions in offering documents. Lehman’s accounting for Repo 105 transactions conformed to generally accepted accounting principles and was approved by Ernst & Young, they said.

“Plaintiffs’ effort to turn the report into a basis for securities law violations fails,” they said in a filing in federal court in Manhattan.

BP shareholders are fleeing the company’s stock amid growing uncertainty about the ultimate bill for cleanup costs, lawsuits, fines and damage to the oil giant’s reputation.

BP’s shares fell an additional 15 percent on Tuesday, as investors reacted to news that the latest effort to stem the gushing oil in the Gulf of Mexico failed over the weekend. It is the steepest drop in shares in about two decades.

Also on Tuesday, Attorney General Eric H. Holder Jr. said that federal authorities had opened criminal and civil investigations into the Deepwater Horizon explosion.

Since the Deepwater Horizon drilling rig exploded April 20, the company has lost a third of its market value, or about $75 billion.

The company said Tuesday that it had spent almost $1 billion on cleanup efforts. But that bill is likely to rise as oil continues to spill into the gulf, with no guarantees that any of the new plans to contain the spill will work.

Investors are also grappling with potential damage to the company’s reputation.

“Financially they can survive this crisis, but politically they will be punished for a very long time,” said Fadel Gheit, an oil analyst at Oppenheimer & Company.

The prospect of billions of dollars more in legal payouts and fines is also weighing on the company.

BP officials say they have already paid $36 million to settle claims of economic loss and damage under the Oil Pollution Act, a 1990 law passed in the wake of the Exxon Valdez disaster, and that more than 26,000 claims have been submitted.

Microsoft Corp. sued Salesforce.com Inc. yesterday, accusing the company of infringing nine patents for ways to make software more efficient.

The complaint targets the customer-relationship management software that is the hallmark of Salesforce.com’s business. It seeks a court order that would prevent the San Francisco-based company from providing features that Microsoft claims it invented.

Salesforce.com, founded in 1999, sells subscriptions to Internet business software that runs marketing campaigns and tracks sales leads. It competes against Microsoft’s Dynamics programs and “has profited through infringement of the Microsoft patents-in-suit,” according to the complaint, filed in federal court in Seattle.

“More and more, we’re seeing Dynamics compete with Salesforce in deals,” said Ray Wang, an analyst with Altimeter Group in San Mateo, California. “Long term, Salesforce and Microsoft are on a collision course for all enterprise software.”

Movie Gallery Inc., the owner of struggling movie rental chain Hollywood Video, is planning to close its remaining stores and liquidate as consumers are increasingly get movies through the mail, vending machines and high-speed Internet connections.

The No. 2 rental chain behind Blockbuster Inc. filed a notice with the U.S. Bankruptcy Court for the Eastern District of Virginia in Richmond late last week that it will terminate its business operations after defaulting on a loan from one of its creditors.

An agreement filed with the court sais the move to close more than 1,900 remaining stores is in the "best interests" of the company and its creditors. The agreement does not specify a time line. It must be approved by a bankruptcy judge.

Phone calls to Movie Gallery and an attorney representing the company were not immediately returned.

The company, based in Wilsonville, Ore., filed for Chapter 11 bankruptcy in February, buckling under the competitive pressure from movies-by-mail service Netflix Inc., DVD kiosk company Redbox and delivery of movies and TV shows over the Internet.

Former Qwest Communications International Inc. CEO Joe Nacchio is set to appear in federal court in Denver to say whether he wants to waive his right to attend his re-sentencing hearings.

U.S. District Judge Marcia Krieger wants to see Nacchio in person Tuesday before allowing him to skip hearings in June where she will recalculate his sentence for insider trading convictions.

An appeals court ruled that Nacchio's original sentence of six years in prison, plus $71 million in fines and forfeitures, was too harsh.

Nacchio has started serving his sentence at a prison in Pennsylvania. Online federal prison records show he was moved to a low-security facility in Englewood, Colo., before the hearing Tuesday.