They went around them. Quickly. There's more than one Van Allen Radiation Belt. Interesting that you didn't know that. This is not news, BTW ... it was explained back in the '60s when Apollo was news.
I post this for the sake of lurkers ... The Flerfs and Lunar Landing Deniers will carry on with their false premises and fallacious arguments.
“They went around them. “
Apollo astronauts went through, not around.