Border Wars explores Money and Corruption - speaking truths of an America few have seen in the Rio Grand Valley, a 43,000 square mile area of South Texas.
Meet specially trained agents and officers equipped to combat the border problems that prevail in South Texas.
Go on patrol on the South Texas border, which is separated from Mexico only by the Rio Grande River.
In Mission, Texas, Officer Heather Schrock is in a high-speed chase with a car reported to be carrying drugs.
Ride along as a Customs and Border Protection helicopter and Border Patrol riverboat assist agents on the ground as they pursue suspected drug mules running through the dense brush on an action-packed chase along the Rio Grande.
When the Coast Guard rescues Cuban refugees from a remote island in the Mona Passage, Customs and Border Protection agents must race to intercept them and verify their identities.
Agents in Puerto Rico enter one of San Juan's most notorious housing projects for an undercover "buy and bust" operation to intercept a dump truck full of cocaine, and race to find illegal immigrants who have landed on a secluded beach.
In Puerto Rico, agents keep a high-value drug seizure from South America secure as they transport it back to San Juan.
Downtown, Border Patrol and ICE agents discover a major drug-running tunnel and suspected smugglers may still be inside.
Border Patrol agents cut off a getaway car as it tries to flee the scene of a drug drop in ranchland east of Nogales, Ariz.
Agents and officers work around the clock to secure the border between El Paso, Texas, and Ciudad Juarez, Mexico.
Along the southern Arizona border at the port of entry, agents detain two families within a 24-hour period, driving similar SUVs and carrying a combined total of nearly $1 million in cash and drugs.
In the southern border towns of Douglas and Nogales, Ariz., agents uncover new and more cunning methods smugglers create to avoid detection, including a drug tunnel under the border.
The Border Patrol fights back against the criminals who use the Rio Grande to cross the border with their contraband.
Law enforcement battles to intercept the massive flow of illicit traffic moving through the Rio Grande Valley.
Drug smuggling has reached "Texas-sized" proportions in the Rio Grande Valley.
National Geographic goes inside the world of U.S. Customs and Border Protection for an unprecedented look at their efforts to prevent illegal immigration and drug smuggling along the U.S.-Mexico border.
Follow the officers and agents of U.S. Customs and Border Protection (CBP) as they scour the inhospitable landscape at one of the busiest border crossings in the country, seeking to fight terrorism and intercept illegal entrants from the air, on the ground, and at the ports of entry.
National Geographic goes beyond the controversy and political wrangling of illegal immigration to see the real-world battles being waged by the men and women responsible for securing our borders.
Season three goes deep inside the struggle as agents fight an escalating drug-smuggling crisis fueled by big money, cartel rivalries and violence threatening to cross into our cities each day.