Spying with balloons Can someone explain why that make sense! And if you have enemy balloons floating over your nuclear

Spying with balloons
Can someone explain why that make sense!
And if you have enemy balloons floating over your nuclear silos, even at very high altitude, would it be fair to say that you have a hole in your anti-aircraft system?
Are they particularly stealthy? https://t.co/Bjuht9Kra0

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