The new video also shows Shehri delivering his last testament in which he chastises Americans and welcomes death.
The term 9/11 uses the American convention of enumerating the month before the date. In all, 2,993 people died, including the 19 hijackers.
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"It's the kind of event that will not really fade emotionally until everyone who was alive at the time has died," said Larry Sabato, director of the Center for Politics at the University of Virginia.
"It takes a while. It was really the 1960s before you could discuss Pearl Harbor rationally without using epithets for the Japanese," he said of Japan's attack on the U.S. base in Hawaii on Dec. 7, 1941.
Nor can 9/11 be separated from politics, especially with former New York Mayor Rudy Giuliani running for president. He leads most of the national polls for the Republican nomination, largely on the strength of his performance that day.
Some groups representing the families of victims opposed giving Giuliani a speaking role in the commemoration, raising concerns he would use the platform to promote his presidential aspirations. But Giuliani will speak as planned, and his aides have insisted that he will not politicize the event.
New York television station WABC tried to deviate from the past by not broadcasting the reading of the names of the dead but backtracked in the face of stiff public opposition.
Bloomberg himself tried to move this year's commemoration entirely off site because Ground Zero is under construction. Families of the victims protested and Bloomberg relented, allowing them limited access.
"It inhibited political speech," said Doug Muzzio, public affairs professor at New York's Baruch College. "That's beginning to diminish but as long as there's a war on terror and there's a politics of terror, 9/11 is going to be a symbol of it.
"Without doubt it will persist through this election cycle," he said in a reference to the November 2008 presidential election.
