Smugglers are using video cameras and small drones to spot vulnerabilities along the U.S.-Mexico border, and the Department of Homeland Security is struggling to stop them.
Reports of unmanned aircraft flying along the Southwest border have spiked in recent months, with more than three dozen sightings since October, when the current fiscal year began. That data point is on a course to quadruple from the previous year, according to U.S. Customs and Border Protection, where officials say they are concerned that criminal groups are using the aircraft for surveillance while seeking paths to traffic drugs and other illicit material into the United States.