A visit to the border helps explain why building Trump’s wall is virtually impossible

A simple wall is not going to fix the problems on the U.S-Mexico border. The flow of undocumented immigrants arriving to the U.S. is ceaseless, a 2,000-mile border wall is not viable and investment in the Border Patrol has already increased threefold over the last decade. Univision took a trip along the border to examine the complexities.