Have they solved how to make living beings cross the Van-Allen belt and still be alive? This belt surrounds Earth at around 400-600km height. Just curious because my cursory reading never reveals if they have solved this nowadays.

Like how they did in the Apollo program?

So, to be clear: someone you can't be bothered to cite claims that NASA(? presumably) lost a technology without explaining what it is? Is there some reason anyone should treat this as credible?

I watched this clip https://www.reddit.com/r/conspiracy/comments/1acyws1/don_pet.... I read some years ago they are trying technology to understand the Van Allen Belt