Originally Posted by Globaliser

IIRC, there was a sad story attached to the delivery flight to SEA. The aircraft was (unusually) given permission to operate supersonically across the continent. During the flight, one of the crew placed their cap into the gap with the intention that as the aircraft cooled, the cap would become trapped there and could then form part of the exhibit. But after arrival, a cleaner thought that it was discarded rubbish and somehow managed to cut it out.