watch it, ok ill tell you, at around 8mins Bart asks Buzz why they faked earth pictures i looked into images for earth and what the hell Bart was talking about, turns out he was right.
then Alan at 10mins ,the Van allen belts had no effect on them and they went through because....they were not discovered,lol . Like i said many things, van allen belts is another.
The Van Allen belts are not a barrier. Going through them quickly is fine. It is just an issue of sensitive equipment with an orbit that spends significant time in that belt.