beginning to remind me of the short story “man without a country’ by Edward Everett Hale. Phillip Nolan, an army officer curses his country and is sentenced to sail forever on a Navy ship without ever seeing the United States.
A Russian air terminal has to be a worse hell than a Navy ship if you have to stay there forever.
Maybe Snowden has an agent searching for property for him to buy in St Kitts
http://www.economiccitizenship.org/