The Skystar 180 tactical aerostat surveillance balloon system developed by Israel’s RT Ita Systems was used to protect world leaders at the recent United Nations climate summit in Paris. And a nice cartoon by Dry Bones to illustrate the significance.

http://www.globes.co.il/en/article-israeli-surveillance-balloon-protects-world-leaders-1001085426

http://www.drybonesblog.blogspot.co.il/2015/12/look-up-in-air.html