Any traveller who has experienced a glacier-slow wait in an international transit lounge might have some sympathy for American defector Edward Snowden.
I'm unclear on the comfort level of the facilities at Sheremetyevo International Airport, but viewing photographs, the interiors resemble every other soulless airport around the planet, suggesting this is not a pleasant place to be holed up for an indefinite period.
The quaintly medieval term "limbo" has been much used by the media to describe the situation the whistle-blower faces as a stateless citizen, now the US has withdrawn his passport accreditation.
I vaguely recall from childhood that "limbo" is some ethereal empty space where your sins are examined and evaluated - a bit like going through airport customs and waiting to see if you follow the green exit line, or if you're required to undergo a search because the doggie has detected a forgotten banana in your luggage.
Russian President Vladimir Putin offered Snowden the opportunity to escape the transit void by offering him asylum in Russia, but only on a somewhat ironic condition, "that he agrees to cease making harmful disclosures about the US from Russian territory".