Greenwald: UK 'Will Be Sorry' for Detaining Partner 'Guardian' journalist promises to go after UK in his reporting By Evann Gastaldo, Newser Staff Posted Aug 19, 2013 12:27 PM CDT 26 comments Comments In this undated photo released by Janine Gibson of The Guardian, Guardian journalist Glenn Greenwald, right, and his partner David Miranda are shown together at an unknown location. (AP Photo/Janine Gibson, the Guardian) (Newser) – Well, now the UK has gone and gotten itself on Glenn Greenwald's bad list. The Guardian journalist behind the Edward Snowden-NSA leaks story told reporters that after his partner was detained for nine hours at London's Heathrow airport, he plans to be "far more aggressive" in his reporting, Reuters reports. "I am going to publish things on England, too. I have many documents on England's spy system. I think they will be sorry for what they did," he said. Greenwald was at the Rio de Janeiro airport at the time to meet partner David Miranda upon his return to Brazil, where they both live. Brazil's government released a statement calling Miranda's detention unjustified, the Guardian also wants answers, and now even lawmakers in the UK are calling for an explanation from police as to why Miranda was held, the BBC reports. The Independent Reviewer of Terrorism Legislation says it's rare for anyone to be held for so long under schedule 7 of the Terrorism Act 2000, which allows police to detain someone at an airport for as long as nine hours to question them about links to terrorism. But "they never asked him about a single question at all about terrorism or anything relating to a terrorist organization," Greenwald says. "They spent the entire day asking about the reporting I was doing and other Guardian journalists were doing on the NSA stories."