As the Houthis' attacks on cargo ships in the Red Sea continue, the United States has retaliated with strikes of its own. Recently, officials designated the militants as a "terrorist group." Norman Roule, a former senior U.S. intelligence official, says the Houthis are an extremist militia element who have been ingrained in Yemeni society for years. They've fought in a variety of civil wars for almost two decades. #Houthis #Israel-HamasWar