Former US spy agency contractor Edward Snowden, who leaked documents about the United States vast spying programme, has left the transit zone of Moscow' airport and entered Russia, his lawyer has said. Anatoly Kucherena said on Thursday that Snowden was issued with papers that allowed him to leave Moscow's Sheremetyevo airport, where he was stuck since his arrival from Hong Kong on June 23. Al Jazeera's Nadim Baba reports.