CAIRO — In a message Tuesday marking the Sept. 11 anniversary, al-Qaida's new leader sought to claim credit for this year's Arab uprisings, saying the 2001 attacks on the United States paved the way for the "Arab volcano" sweeping the region a decade later.

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Ayman al-Zawahri and other al-Qaida figures have issued a number of messages seeking to associate themselves with the Arab uprisings that toppled autocratic leaders in his native Egypt, as well as Tunisia and Libya, and which threaten others.

In the messages, they urge Arabs to replace toppled regimes with Islamic rule.

The wave of unrest transforming the Middle East, however, was largely the work of young, peaceful protesters seeking democratic freedoms, and political observers say it showed the failure of al-Qaida's extremist ideology and how out of touch the terror group is with Arab youth.

U.S. intelligence officials obtained a copy of the message a week before al-Qaida posted it on extremist websites, NBC News reported.

"By striking the head of the world criminal," al-Qaida forced America to press its allies in the Middle East to change their policies, which helped the "Arab volcano" to build up and explode, al-Zawahri said in the hour-long audio message.

"The Arab people have been freed from the chains of fear and terror, so who is the winner and who is the loser?" al-Zawahri said.

"The blessed rebellious Arab earthquake has turned America's calculations head over heels," he said. The United States had lost key regional allies in the upheaval, he said.

Bin Laden message
The video also included a message that al-Qaida said was recorded by Osama bin Laden before his killing in May by U.S. special forces, in which he warns Americans against "falling as slaves" to the control of major corporations.

Video: U.S. official: Al-Qaida has been 'shattered' (on this page) Al-Zawahri was bin Laden's deputy and became head of al-Qaida in June after bin Laden's death in the May 2 raid by U.S. Navy SEALs in Pakistan.

Al-Zawahri had a long history of fighting against Hosni Mubarak's rule in his home nation, leading militants who carried out deadly bombing and shooting attacks in the 1990s.

Islamic militants considered the regimes of Mubarak and other U.S.-allied autocrats in the Middle East to be corrupt, godless and too closely aligned with the West.

Their attacks were met with a crackdown by Mubarak's security forces that largely crushed their operations in Egypt.

In his new message, titled "The Dawn of Imminent Victory," al-Zawahri also lashed out at the United States for what he called "blatant deception" in showing support for the Arab uprisings while keeping strong ties with leaders in the absolute monarchies of the Gulf, like Saudi Arabia.

"Why doesn't it (the U.S.) say anything to Al Saud, the killers of Muslims and the thieves of their wealth," he said, referring to the Saudi ruling family.

The U.S. was on high alert during the weekend over what officials described as a credible but unconfirmed terror threat on Washington or New York.