The shame is that alfalfa needs the humble bee to germinate. So, the GMO alfalfa crop may have been hundreds of miles away, and the contamination with the non-GMO crop spread by the bee. The non-GMO, organic farmers lobbied congress not to allow GMO crops that needed bees to germinate, as they were afraid that once allowed, no organic crop would be safe.
This doesn't bode well for organic farmers everywhere.