I was thinking probably a seriously ill passenger would be the only reason!
True, landing will pale into insignificance compared to getting it out, and it sure won't have enough fuel to get it back to the states when it does go!
Mistaken identity, I think not, although I did not see it personally, a colleague saw it from his window in the city. He is a pilot and aero eng student, I am sure he can tell his Boeings' apart!