"He's anxious about the next step..But feels really good about the debate he provoked," Greenwald, a lawyer turned muckracker who works for Britain's liberal Guardian newspaper, told AFP.
"He's very calm, without any fear and definitely happy about the choices that he made," added Greenwald who lives in Rio.
Currently stranded in Moscow, Snowden has applied for asylum in 27 countries in a bid to evade US justice for disclosing the existence of US electronic surveillance operations on a global scale.