isis sympathizers opened fire and were shot dead at a similar event in texas. more now from sara sizener. >> reporter: complete strangers, chan and muslim greet, expecting hundreds to gather for a controversial cartoon contest to depict the provest mohammed outside of the phoenix mosque. >> i notice you are armed. >> yes, ma'am. it is a 9mm ruger and it is loaded and there is a round in the chamber. and i have another weapon in my pocket. >> and why have you come out here armed like this and showing it off. >> i'm out here to show the united states has the first and second amendment rights and these people are on notice. we are not afraid of them. they want to promote their terrorism, they can do it in another state and not in this country. >> and warren doesn't want to