I don't know which weapon would be used. A laser or a machine gun can take out a balloon if you're close enough. Even if missiles are used, closer range air-to-air are cheaper.
Also, approaching the balloon in stealth with a plane that has its own radar system is considerably less paraphernalia than ships chasing balloons.
I could be wrong about how the SR-71 will be used, but I'm very sure using expensive missiles designed for much more advanced threats to take out balloons is insanity.
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I don't know which weapon would be used. A laser or a machine gun can take out a balloon if you're close enough. Even if missiles are used, closer range air-to-air are cheaper.
Also, approaching the balloon in stealth with a plane that has its own radar system is considerably less paraphernalia than ships chasing balloons.
I could be wrong about how the SR-71 will be used, but I'm very sure using expensive missiles designed for much more advanced threats to take out balloons is insanity.