Dale M makes multiple false statements at the end of his answer. Here are some corrections, and then my answer:
1)Assange is NOT in hiding in the Ecuadorian embassy in London and is not avoiding questioning.* Assange has agreed to make himself available for questioning, and remains so, but the Swedish prosecutor refuses to interview him.* He was granted asylum in Ecuador and resides in the embassy because of the espionage case.*
As the United Nations Working Group on Arbitrary Detention Chair and Norwegian international Law Professor Mads Andenæs has said in an interview,
"[T]he Swedish authorities could have followed the normal practice of interviewing Assange in a British police interview room.
After Assange took residence in the Ecuadorian embassy they could have relied on ’mutual assistance’ protocols, questioned Assange by video link, and given him the chance to respond to the allegations against him."
2)He IS being investigated with respect to espionage charges related to publishing the Manning documents. There's no evidence the secret grand jury has ceased its investigation.
3)There IS a question regarding immunity. Greenwald is fearful and takes extreme precautions when he travels to the US because he fears abusive prosecution for and further interference with his work as a journalist.
The US government did try to stop the US media from publishing the Pentagon Papers and succeeded temporarily - and very nearly succeeded permanently. Charges under the Espionage Act could be used against Greenwald and the media employing him, despite US v. NY Times.
*Detailed evidence that repudiates the false statements and supports the corrections is referred to here: https://justice4assange.com/Assange-Case-Fact-Checker.html