9/11 anniversary: Ceremonies unfold amid heightened security

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The nation commemorated the 10th anniversary of the Sept. 11 terror attacks on Sunday amid heightened security as authorities continued their efforts to unravel details of another possible attack.

Administration officials said last week that they had credible but unconfirmed information about another strike, designed to coincide with Sunday’s ceremonies memorializing the victims of the Sept. 11, 2001, attacks that killed almost 3,000 people in New York, Arlington, Va., and Pennsylvania. As many as three attackers could be involved in the latest plot and they might be using a form of a car bomb in New York or Washington, officials have said.

While officials stepped up security, they were also quick to insist there was no evidence confirming any terrorist operation and that their warning was a precaution.

“We’re making sure that we can assure the American public that, if there’s something out there, that we will do our best to thwart any attack,” John Brennan, advisor to President Obama on homeland security and counterterrorism, said on “Fox News Sunday.”

Brennan met with other senior counterterrorism officials in the White House Situation Room on Sunday morning to review security preparations, deputy press secretary Josh Earnest told reporters on Air Force One.

The session had been previously scheduled and no specific new information from the meeting was reported to the president, he said. Nor was there any new information on threats, he said.

Speaking on CBS’ “Face the Nation,” Brennan said there were “important leads” still being investigated.

“We do have some information about the nature of the attack that is being reported,” Brennan said. “We also have some information about the possible individuals, but I don’t want to get into any operational details. I don’t want to compromise anything that could lead us to individuals who may be part of this plot.”

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-- Michael Muskal