Alaska, Arizona, California, Colorado, Connecticut, Hawaii, Idaho, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Minnesota, Missouri, Montana, Nevada, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Oregon, Pennsylvania, Rhode Island, Wisconsin, and Wyoming all have some variation of the "Castle Doctrine", which means that they do NOT have the obligation to flee rather than defend themselves in case of an intruder. In those states, you may shoot someone if they break in and mean to cause you bodily harm. In other states, you are to flee rather than defend yourself.