Prime Minister John Key has challenged Edward Snowden and Glenn Greenwald to front up with evidence of their claims of mass surveillance and NSA bases in New Zealand. Mr Key responded this morning to Snowden's claims that New Zealanders' metadata was included in the XKeyscore data harvesting programme used by the US and that there were two NSA bases in New Zealand. Mr Key said neither had provided any actual evidence of their claims and said it was simply rhetoric.