As per the news, [NSA whistle-blower Edward Snowden has had his passport revoked](www.reuters.com/article/2013/06/23/us-usa-security-passport-idUSBRE95M0CW20130623) by the US Government.  

From the article:

> It was not immediately clear how Snowden was able to travel,

However, he was able to fly from Hong Kong to Russia, and apparently plans to continue on to Latin America / Cuba.  

With a revoked passport, how is one legally able to travel internationally??