The WT HIDTA region lies along a 520-mile section of the U.S.-Mexico border in Southwest Texas, encompassing 12 counties. This HIDTA region is used by Mexican drug trafficking organizations (DTOs) as a principal smuggling corridor and staging area for drug transportation to markets throughout the United States. The smuggling and trans-shipment of multitons of marijuana and multikilogram quantities of powder cocaine are the principal drug threats in the WT HIDTA region. Heroin, methamphetamine, other dangerous drugs, controlled prescription drugs, and chemicals used to manufacture methamphetamine are also smuggled into and trans-shipped from the WT HIDTA region; however, the quantities seized in this region are well below those seized in other areas along the Southwest Border. This is most likely the result of increased enforcement efforts in Mexico and the ongoing conflict between cartels in the El Paso/Juarez plaza, as well as increased, coordinated law enforcement "surge" operation along the border. The WT HIDTA region is a source area for weapons smuggled into Mexico. Mexican DTOs and their associated enforcement groups generally rely on firearms smuggled from the United States into Mexico for their enforcement operations. Violent crime in the WT HIDTA region is largely the result of large-scale drug trafficking throughout the region. Powder and crack cocaine, marijuana, and methamphetamine contribute most to violent crime in this region. 5 tables, 1 figure, 11 notes, and a list of sources for data and information presented in this report