If that is the case, then I've been to Paris (it's a state, isn't it? ). But I've never been to Paris, just the airport. There are no printed rules although, like someone else above, I don't count it on my list unless I stop and spend purposeful time in a state. It doesn't have to be long, but peeing at a rest stop doesn't count. Sorry for my French ... that Paris visit did it to me.Now that this is official and all, does touching down at an airport but not leaving the plane count? I can add Missouri to my list if so.
If you need your feet on the soil (airport gate count?) then that's another issue.
Delaware has no National Parks or places that you can call national-somethings (monuments, forests, etc). In fact, only about half the states have true National Parks ... and there is a National Park on American Samoa and St. Johns, USVI.Only 21. But planning to take the DS3 and DS5 to National Parks in all 50. They have it to 5 states and counting.