[garjog]

Here is my guess: we have secret technology that can listen to conversations on the ground from space by precisely measuring air pressure.

[Ronin]

I know that is supposed to be funny, but did you know the Russians actually use something very similar to that for super sensitive conversations?

Soviet GRU defector Vladimir Bogdanovich Rezun described it just like that in his book “Aquarium”, which he published under the pen name of Victor Suvurov. The only difference I can see, is that in his description, Rezun said the device had a flexible hose connecting the bubble helmets.