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Nasa to test drone in commercial airspace

Researchers to study sense-and-avoid technology that warns of planes

Testing: Nasa's goal is to harvest data that will help design systems so that big drones can fly above 18,000 feet, in airspace used by airliners. - PHOTO: BLOOMBERG

[ORLANDO] The Predator drone, known for its stealthy strikes on terrorists, will begin flight tests early next year to prove that large unmanned aircraft are safe while operating amid commercial planes. Researchers will be studying so-called sense-and-avoid technology, designed to alert the