Dropmire is a secret surveillance programme by the National Security Agency aimed at surveillance of foreign embassies and diplomatic staff, including those of NATO allies. The programme's existence was revealed in June 2013 by whistleblower Edward Snowden in The Guardian newspaper. The report reveals that at least 38 foreign embassies were under surveillance, some of them as far back as 2007. Earlier in June 2013, The Guardian had reported that the NSA spied on diplomats during the 2009 G-20 London Summit, but no precise program name was revealed at the time.