We believe this is the most extensive investigation on the U.S. border conducted by a Sunday news program in 2016. We begin by revealing one of the biggest issues that's gotten lost in the debate over illegal immigration: the disturbing increase in drug smuggling. In Border Control, we find evidence that our southern border is not under U.S. control. In Tunnel Vision, we expose some of the underground tunnels that cartels have used to smuggle drugs and people into the U.S. In Bordertown, USA, we provide an unusual profile of a U.S. border town so influenced by illegal smugglers and drugs, that the culture has worked its way into the fabric of daily life: Douglas, Arizona. In Crossing the Line, we take an eye opening look at the corruption inside U.S. Customs and Border Protection. And in Cuban Exodus, we exclusively reveal the “mind-boggling” number of Cubans surging across the Mexican border into the U.S.