for reform but did not call on mubarak to step down. the worst case is extremist government in egypt similar to one in iran. catherine herridge tells us whether egypt muslim brotherhood poses that kind of danger. >> while analysts who or what is behind the protest in egypt a group is seeking political legitimacy. banned under the constitution that prohibits religious paced parties, they're throwing the support behind elbaradei as an opposition leader. many fear mubarak shows the real replacement is the muslim brotherhood or islamic fundamentalist group. they said the fear is unwarranted. >> this is bogus. they are no way extremist or using violence. >> critics say the brotherhood established in egypt in the 1920s is sigh no, ma'am mouse with political islam or support