US officials and politicians, particularly those in states that border Mexico have repeatedly warned of a "spillover" of violence from Mexico's drug violence.
And both the Texan and Arizona governors have gone as far as calling for the deployment of the US national guard to the US-Mexico border.
But others have disputed the concept of Mexican violence bleeding over the border.
Al Jazeera's Monica Villamizar went to Phoenix, Arizona, to try and separate fact from fiction.
