[rdcbn1]

It's actually pretty hard to keep helium from leaking

There are Helium leaks and there are HELIUM LEAKS.

I'm assuming that Boeing is dealing with the former.

[FreedomPoster]

We regularly have folks here on FR advocating for hydrogen-powered cars. Same issue there, it’s a really small molecule (atom in the case of helium), and it really wants to leak.