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   London Heathrow Airport has purchased advanced equipment to keep drones out of   
   the sky. Environmental groups threaten mid-September with drones to hinder air   
   traffic.   
       
   Drones, whether or not intentionally used around airports, can cause dangerous   
   situations, such as collisions with aircraft.   
       
   To eliminate drones at an early stage, Heathrow invested millions to install   
   advanced systems that can detect and remove drones. The latter is done by   
   disrupting the communication between the drone and the driver.   
       
   Such equipment is increasingly being used, among other things, to secure   
   important events and during military operations.   
      
   --- D'Bridge 3.99   
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