What countries can the citizens of those countries not fly out of in any way (commercial or business, helicopter or plane)? Iran? Vietnam? Laos? North Korea? Iraq? Cuba? Any others? What countries is the freedom to fly to any other country restricted for the citizens (like a communist country to a communist country, but nothing else)? What countries are citizens of a certain country not allowed to go into (Americans can't go to Iraq, Iran, Libya, North Korea, Vietnam is restricted, Cuba people go there anyway, maybe some others)?