News Snapshot:
The US military has now shot down four high-altitude objects that had entered American and Canadian airspace, raising questions about their purpose and origin. The first of these objects, a Chinese balloon, was downed by a fighter jet on 4 February. While China says it was for weather monitoring, US officials say it was being used for surveillance. A knowledge of technology in this area throws up some clues about what may have been going on. Advertisement Advertisement The balloon is believed to have supported a signals intelligence collection payload, although this has yet to be confirmed. Debris has now...
