Earlier this year I was standing in Newark Penn station waiting for a train. There must have been some sort of alert, because there were around twenty cops standing around, many in full body armor with automatic weapons. I commented to my coworkers the next day that given the frequency of unjustified police shootings I thought I was more likely to be shot by a cop than be the victim of a terrorist attack.
Well, Wired magazine seems to agree with me:
http://www.wired.com/news/technology/0,71743-0.html?tw=wn_index_12
Look at their "color coded chart" at the bottom of the article.
People killed by terrorists: 3147
People shot dead by law enforcement: 3949
