(The Conversation) – The recent spate of unidentified drone sightings in the U.S., including some near sensitive locations such as airports and military installations, has caused significant public ...

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Add Yahoo as a preferred source to see more of our stories on Google. Small drones can be hard to track at night. Kevin Carter/Getty Images The recent spate of unidentified drone sightings in the U.S.

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Some of this recent increase in activity may ...