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Why We're Suddenly Spotting Spy Balloons
By Sophie Bushwick
Balloons vs. satellites: Popping some misconceptions about capability and legality
By Theresa Hitchens
Chinese spy balloon over the US: An aerospace expert explains how the balloons work and what they can see
By Iain D. Boyd
How do stratospheric balloons work? Here's a visual guide.
By Derek Hawkins, Dylan Moriarty and William L. Neff