(Once you have power, engineering it to predictably accomplish what you want to accomplish is detail-work.)
I don't think this is detail work; I think this is a serious point of contention. There are hosts of single-issue, small-time politicians who manage to achieve their goals. Assassins rarely achieve any goals beyond killing their targets. Hinckley didn't get Jody Foster; Sirhan didn't prevent Israel from getting military support from the US; Loughner didn't stop women from holding positions of political power. Breivik appears to have hurt his cause more than helped it, but it's too soon to judge the full effects. What are the broader goals that assassins have successfully accomplished?
I'm under the impression that Yitzhak Rabin's assassination was a political success, though I'm willing to be corrected.
A reminder for everyone: on this day in 1983, Stanislav Petrov saved the world.
It occurs to me this time around that there's an interesting relationship here - 9/26 is forgotten, while 9/11 is remembered. Do something charitable, and not patriotic, sometime today.