Video: Osama Bin Laden Death Anniversary Prompts Terror Warnings

A warning issued Wednesday highlights the concern of "lone wolf" terrorists.

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The FBI and Department of Homeland Security issued a warning Wednesday about possible terror attacks on the one-year anniversary of Osama Bin Laden's death.

Authorities are concerned that a "lone wolf" terrorist could strike on May 1, but say there have been no specific or credible threats.

Bin Laden, the leader of Al Qaeda, was killed in his Abbottabad, Pakistan compound during a raid conducted by U.S. Navy SEALs on May 1, 2011.

Greg Otto is the News Editor at U.S. News & World Report. You can follow him on Twitter (@gregotto) or contact him at gotto@usnews.com