Reporter's partner 'forced to reveal' email passwords

The partner of a Guardian journalist, who wrote a series of stories on the US National Security Agency's mass surveillance, said he was forced to reveal his social media and email passwords while detained at Heathrow Airport.

David Miranda (left) travelled to Rio to meet his partner Glenn Greenwald. Credit: Joao Laet/Agencia O Dia/Estadao Conteudo.

David Miranda told the BBC he was threatened with imprisonment if he did not comply with his interrogators requests.

The Brazilian, who is the partner of reporter Glenn Greenwald, said disclosing his passwords made him feel as if he was "naked in front of a crowd".