[csandreasen]

They revoked his passport the day before he left Hong Kong [1]. He traveled to Russia on what turned out to be an invalid travel document issued by the Ecuadorian embassy in London [2] (same one that Julian Assange is holed up in).

EDIT: Added citations

[1] http://bigstory.ap.org/article/ap-source-nsa-leaker-snowdens...

[2] http://www.theguardian.com/world/2013/jul/02/ecuador-rafael-...