If you had to choose ONE side, which country was the most responsible for the Cuban Missile Crisis and why?

Just off the top of my head, I would say the Russians. They should not have put missles so close to the US. Everyone was so paranoid back then.

Well, the Russians did influence the Cubans...
So probably them.

well from what i can see, i would have to go with america. if you look at the entire big picture.