Out its largest Military Operation against criminal drug gangs that have taken over prisons and parts of the country. New video obtained by Cbs News showed journalists evacuating an ecuadorian Tv Station this week, gunmen took over the studio during a live broadcast. Jose Luis Calderon had guns pointed to his head, a stick of Dynomite Put in his pocket. They said theyll kill us all. I was under a Desk Reporter Diego arcos was one of many staffers who ran for safety, hiding on the roof, inside offices, unbeknownst to the gunmen, behind a studio wall. We were just trying to stay still, not moving, not even trying to breathe. Reporter the national police responded quickly, arresting the gunmen. What is causing the violence . The fundamental root is drug