As it turns out, if you live within about 15 miles of a base, you really shouldn't bank on your garage door opener working very often. In 2013, some 500 Georgia homeowners near Fort Gordon found themselves frantically clicking a remote like their TV had gotten stuck on Bravo. Since 2011, the same thing has started happening all over the country, including to residents of Norfolk, Virginia, Puget Sound, and Orange County, California, to name a few. Still, of all the excuses to be late for work, not being able to get out of your garage because the biggest army in the world won't let you is one of the better ones.
What's causing the problem? Radio waves. Since World War II, the 380-399.9 megahertz range has been reserved by the Department of Defense for military communications. However, the frequencies were so infrequently used that some garage door manufacturers started "borrowing" that band without the military ever noticing. This changed when bases started switching to the relatively new Enterprise Land Mobile Radio System, creating a lot of interference on these channels and, as a result, a lot of dented cars. Military base neighbors wanting smooth garage action can buy a $60 device that changes their frequency, while others get to deal with the military randomly revoking their driving privileges. Fortunately, since the military doesn't use the frequency for anything super-duper top secret, you're not going to accidentally launch any nukes by pressing the button for your garage ... probably.