So if you want your kid to be an American citizen, all you have to do is book a flight from Tijuana to Vancouver and induce labor right after takeoff. Or fly back and forth repeatedly until nature takes its course.
This makes no sense to me. I know kids born to diplomats while on US soil aren't automatic Americans. I'd think people just flying through our airspace would be treated the same.
...and kids born to US diplomats on foreign soil do not receive automatic citizenship. Their parents have to apply for it.