Border patrol agents say smuggling operations have streamlined into smaller packs of younger, more aggressive men who are increasing their use of the remote Texas-New Mexico desert. The Las Cruces Sun-News reports that agents say these younger illegal immigrants, some carrying 50 pounds of drugs for several days, travel in groups of two to five and evade capture by heading quickly to the mountain canyons of the Texas-New Mexico border. The change comes as smugglers try to adjust to beefed-up, high-tech security along the border that has resulted in large drops of border arrests since 2006. Bobby Stephens, a U.S. Customs and Border Protection agent, says to combat smaller smuggler groups in remote border regions, agents are using horse patrols so they can move faster.