We can't get past the Van-Allen radiation belts.
It would be like putting aluminum in the microwave. The Astronauts would have been irradiated.
Apllo 11 would have had to activate a 500,000 Tesla magnetic field to shield itself.
I have yet to hear of that ever happening since aluminum can't be magnetized.
You're kinda stuck in the 'cannae-do' past there, don't you think?
http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970228a.html