For example, suppose North Korea launches an ICBM into the high atmosphere over North America and unleashes an EMP weapon that destroys nearly all electronics; this could theoretically be followed by a naval invasion of forces from Red China and North Korea, both of which suffer from too many young males that can hardly be fed and might as well be thrown at some enemy nation as cannon fodder. These forces would plow right through Southern California, with all its anti-gun laws and totally unprepared populations.
If some enemy force was foolish enough to try to enter Texas, they would be obliterated by a mass of Texas farmers, ranchers, National Guardsmen, law enforcement officers and ex-military men who are all locked and loaded to the hilt. That's where I feel safest, in the midst of the best-armed and most well-skilled riflemen in the country, most of which are upstanding, community-minded citizens who defend life and liberty. Texas is a fortress of determined men and women who will not, under any circumstances, willfully surrender their freedoms or their Bill of Rights.
That's why people who don't own guns dial 911 -- because they want men who DO own guns to arrive as quickly as possible and solve their problem.