Alexander Kirk: Conclusion - S3-E23
Factual error: Airport Abel Santamaria is not in Baracoa, but in Santa Clara. Baracoa airport's name is Gustavo Rizo.

Starring: James Spader, Ryan Eggold, Diego Klattenhoff, Megan Boone
Alexander Kirk: Conclusion - S3-E23
Factual error: Airport Abel Santamaria is not in Baracoa, but in Santa Clara. Baracoa airport's name is Gustavo Rizo.
Factual error: The bomb is supposed to go off at the "DC Zoo", but the scene takes place at the National Botanical Garden, on the complete opposite side of DC from where the Smithsonian National Zoo actually is.
Trivia: Red's trademark fedora was James Spader's idea.
Question: At the beginning of the final segment, the American Flag is flying upside down outside the beach lodge. Since it is pretty clear that Red would not being trying to elicit support/backup for the deeds that he and his female accomplice were about to undertake, what is the significance of this widely accepted distress signal?