I don’t get it:

21 psi  ~= 1.4 bar
15 feet ~= 4.5 m

To reach 1 bar pressure you need ~10m of water no?

not crows actually, but it took me time to find it (at least 44seconds!)

so here you go:

I don’t think it’s made by Boeing

weird choice of picture, as it’s clearly one battery for headsets like those why would you need to charge both sides?

I left Ubuntu some years ago because I wanted apt install a package and it got hijacked by snaps without warning.

Something tells me I shouldn’t look this up

edit: oh, it’s fictional

should have put a date on it, in case things get better for you in the USA, maybe, one day, who knows?