Not sure if this is what inspired OP, but I just learned the fact about astronauts going through customs yesterday, in a video posted by Channel 5 on YouTube. The context was that Andrew Callahan, who is a US citizen, tried crossing the Rio Grande with Coyotes for journalistic reasons, and he learned the hard way that there are NO exceptions to the rule requiring entering through customs. Not for journalists, and not for astronauts.
Not sure if this is what inspired OP, but I just learned the fact about astronauts going through customs yesterday, in a video posted by Channel 5 on YouTube. The context was that Andrew Callahan, who is a US citizen, tried crossing the Rio Grande with Coyotes for journalistic reasons, and he learned the hard way that there are NO exceptions to the rule requiring entering through customs. Not for journalists, and not for astronauts.