Arizona 360 learned more about the existing challenges with border enforcement from Rodolfo Karisch, chief patrol agent of the Border Patrol Tucson Sector. Karisch oversees more than 3,600 agents.
"We have agents on a daily basis who go out into these mountains to patrol out there on foot. In certain areas we have to insert them by helicopters because there's no road," Karisch said. "So the danger always going to be there."
Karisch described his sector as having "fragile" control over the region.