the reason enough to say none can reach moon is that van allen radiation belt, their is no shield developed yet that can protect humans from it..
read wiki clearly about van allen radiation beltt
and one more thing...... isnt it strange that the scientists of entire world are not good enough to go beyond 400 miles in the space except amrikans who say that they have travelled about 400000 miles........... Think about the facts before nobbing your head to agree anything.
Read all the facts......... and then do an analysis........ the truth will come out by itself.