Snowden's journalist: I will publish UK secrets

The journalist who first published secrets leaked by former NSA contractor Edward Snowden has vowed to publish more documents.

Glenn Greenwald made the statement after his partner was detained and questioned for nine hours at London's Heathrow Airport under a British anti-terrorism law.

Greenwald says the detention was an attempt to intimidate him and stop him from publishing more secrets leaked by Snowden. He's promised more aggressive reports and threatened to publish documents on England.s spy system.

Greenwald met with Snowden in June in Hong Kong and got up to 20,000 documents with details of NSA surveillance programs.