Somewhere, someday, this will happen. It is only a matter of time. What is equally worrisome is North Korea's drone technology capable of distributing chemical weapons. I can easily see North Korea selling this to get back at the West.
http://www.dailymail.co.uk/news/art...ng-mass-casualty-chemical-attack-Britain.html
http://www.dailymail.co.uk/news/art...ng-mass-casualty-chemical-attack-Britain.html