The Council on American-Islamic Relations, the largest Muslim civil rights and advocacy organization in the United States, has said it will not participate in or endorse the "Million American March Against Fear" on the anniversary of the Sept. 11 attacks.

"We're concerned that the event has aligned itself with so-called 9/11 truthers," Ibrahim Hooper, CAIR's communications director, told Al Arabiya.

He was referring to those who express doubts about the perpetrators of the 9/11 attacks.

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