Did Obama cancel the European missile defense on Joe Biden's advice?

VP Joe Biden claims he was deeply involved in the decision to cancel the missile shield in Europe. That explains a lot. Apparently, Biden doesn't think Iran is a threat. Some experts fear they will have enough uranium for a nuclear warhead by the end of this year. Iran is expected to have ICBM capability by 2015 or sooner.

CNN reported:

But he did explain the logic of doing so, saying Iran -- a key concern for the United States -- was not a threat.
...
I am less concerned -- much less concerned -- about the Iranian potential. They have no potential at this moment...

Biden said he is "deeply" involved in the review of the missile defense program.