NSAとGCHQはイスラエルのドローン（無人航空機）ハッキングを用いた諜報活動のためにオープンソースのソフトウェアを使用している？

下記の記事が出ている。

　NSA, GCHQ used open source software to spy on Israeli, Syrian drones
　ars technica: January 30, 2016
　http://arstechnica.com/information-technology/2016/01/nsa-gchq-used-open-source-software-to-spy-on-israeli-syrian-drones/

　Israeli drones and jet signals slurped by UK and US SIGINT teams
　Register: 29 January, 2016
　http://www.theregister.co.uk/2016/01/29/israeli_drones_and_jet_signals_slurped_by_uk_
and_us_sigint_teams/

　GCHQ and the NSA spied on Israeli drone video feeds
　Verge: January 29, 2016
　http://www.theverge.com/2016/1/29/10872860/gchq-nsa-drone-spy-snowden

　Spies in the Sky - Israeli Drone Feeds Hacked By British and American Intelligence
　Intercept: Jan. 29 2016
　https://theintercept.com/2016/01/28/israeli-drone-feeds-hacked-by-british-and-american-intelligence/