WASHINGTON -- The State Department acknowledged Thursday major weaknesses in security and errors in judgment exposed in a scathing independent report on the deadly Sept. 11 assault on a U.S. diplomatic mission in Libya. Two top State officials appealed to Congress to fully fund requests to ensure diplomats and embassies are safe.

Testifying before two congressional committees, senior State Department officials admitted that serious management and leadership failures left the diplomatic mission in Benghazi woefully unprepared for the terrorist attack that killed Ambassador Chris Stevens and three other Americans.

"We clearly fell down on the job with regard to Benghazi," Deputy Secretary of State William Burns told the House Foreign Affairs Committee. Earlier, before the Senate Foreign Relations Committee, Burns said: "We learned some very hard and painful lessons in Benghazi. We are already acting on them. We have to do better."

Burns and Deputy Secretary of State Thomas Nides testified in place of Secretary of State Hillary Rodham Clinton, who was under doctor's orders to stay home to recover from a concussion she suffered last week. Burns and Nides reiterated Clinton's written acceptance of the panel's report and vowed to implement each of its 29 recommendations.

The White House also made its first comment Thursday on the report. Spokesman Jay Carney said that what happened in Benghazi was "clearly unacceptable," and that problems had to be fixed.

The report found that "systematic failures and leadership and management deficiencies at senior levels" of the State Department meant that security was "inadequate for Benghazi and grossly inadequate to deal with the attack that took place."

The Senate hearing provided an odd scene because the committee chairman, Sen. John Kerry (D-Mass.), is the top candidate to replace Clinton as secretary of state.

In an opening statement, Kerry said the department had "clear warning signs" of a deteriorating security situation before the attack. He also faulted Congress for failing to provide sufficient money to protect facilities worldwide.

Latest videos

Newsday LogoSUBSCRIBEUnlimited Digital AccessOnly 25¢for 5 months
ACT NOWSALE ENDS SOON | CANCEL ANYTIME