Depending on what data you look at, as an American you are between 8 and 50+ times more likely to be killed by a police officer than a terrorist. We spend trillions of $ on defense which is obviously needed but perhaps we should focus a bit more on the internal. I am in no way saying all the blame lays with police officers (my brother is a cop), but maybe we can help the entire system with a bit more understanding and new approaches.
As a small segway, the following is a list of other things that are more likely to kill you than a terrorist:
Brain-Eating Parasites, Texting While Driving, Accident caused by a Toddler, Lightning, A Deer, Falling Out of Bed, Food Poisoning, Choking On Food, Bathtub Accident, Financial Crash, Being crushed to death, Medical Errors and my personal favorite...Autoerotic Asphyxiation.