Every time I see a pundit talking about the advisability of "taking out" someone, I cringe.

Some years ago, my father, an ex intelligence officer, military historian, and no stranger to the murky world of peacetime intelligence, researched and studied the 15 or so assassination attempts on Hitler, including traveling to Germany to interview surviving members of one plot.

The operations ranged from "Lone Wolf" single person amateur operations to highly planned multi person military operations. His conclusion was that Hitlers survival demonstrated the very high degree of difficulty of conducting a successful operation against anyone who takes even the most rudimentary physical and information precautions - and has a little luck.

When asked, during a seminar on the subject if he was aware if anyone had conducted a successful operation against a major target he simply said "Not Yet".