Tethered drones, such as this one showcased by Elistair in 2021, offer unlimited flight time and are invulnerable to external frequency disruptions. (Photo by JOSEPH PREZIOSO/AFP via Getty Images) ...
U.S. officials warn that cartel-operated drones on the border pose a major threat. Mexican officials are less certain. Analysts say the answer is likely in between. By Jack Nicas and Paulina Villegas ...
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