One more time, to clarify: if the Summit is organized in the US then anybody living in a country lacking the "visa waiver" status with the US has only 30-70% chance of getting a visa to attend the summit. This includes many Eastern European countries (Bulgaria, Poland, Romania, Serbia, etc.), Latin American countries, Turkey, etc. Two possible scenarios are (1) refusal to issue a visa based on suspicions that the applicant is going to stay in the US, and (2) delaying visa issue until it loses relevancy. This, not the cost, and not the stupid fingerprinting thing, is going to be one of the main reasons against organizing the Summit in the US.