Many of us consider our hometowns to be our safety nets. But the truth is, the town you grew up in or live in now might not be so safe after all. There are plenty of dangerous parts of the U.S. In fact, security systems company Alarms.org analyzed data about gun violence, crime rates, and police force adequacy to find out which major metropolitan areas (with populations over 100,000) were the most dangerous. Based on the weighted value of these metrics, each city was given a total crime score. The metropolises with the highest scores are all over the map, from the South to the Pacific Northwest. Here, we’ve ranked the 100 most dangerous cities in America. And to see how where you live affects your life-span, Here’s How Long You’re Likely to Live in Every State.