I suppose I could have been more concise and said, "one can be convicted of 'conspiracy to commit bank robbery'"
Not going to search through all you morans' conviction files her at FBI HQ, so I'll just throw this out:
"A specific action someone plans or carries out does not have to be a crime itself to be considered part of a criminal conspiracy, it only need to play some role in an overall plan that will involve a crime. For example, buying ski masks is not a crime, but if they are being bought as part of a plan to rob a bank, the people buying the masks could still be charged with conspiracy to commit bank robbery.
The crime of conspiracy can be charged whether or not the plan is ever actually carried out, and whether or not the crime is ever committed. The offence depends on the agreement to commit specific actions as part of a plan that involves a crime, rather than any part of the plan actually being carried out.
So, if two people plan to rob a bank and they go to buy ski masks to wear during the robbery, they can be charged with conspiracy to commit bank robbery, even if they never actually rob the bank or even attempt to rob the bank."
Source:
What is criminal conspiracy