Phoenix police and the Federal Bureau of Investigation say they are aware of a man's plans for a Muhammad cartoon drawing contest scheduled for Friday in front of a Phoenix mosque.

"I let them know we're coming to their doorstep and we're going to be there utilizing our First Amendment; we'll be ready to protect it with our Second Amendment," contest organizer Jon Ritzheimer said.

The cartoon drawing contest is similar to one in Garland, TX, at which two men from Phoenix tried to ambush participants, shooting a security guard before they were shot and killed by police.

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