> Could this club sue for the cost of the balloon?
Almost certainly not. https://en.wikipedia.org/wiki/Sovereign_immunity_in_the_Unit...
Almost certainly not. https://en.wikipedia.org/wiki/Sovereign_immunity_in_the_Unit...
That doesn't mean that they would win such a lawsuit, however.
Cops regularly get qualified immunity for absolutely egregious conduct. The military is not going to get successfully sued for shooting down a $12 balloon while acting in good faith on national security duties.
Again, you may want to carefully read the article you linked, and linked articles within such as the one on the Federal Tort Claims Act: https://en.wikipedia.org/wiki/Federal_Tort_Claims_Act
The decision here would be "there's no clearly established law that the US can't shoot down a balloon with an F-22" on qualified immunity grounds.