Complex sentence: As a teenager he was in the elite when he traveled by commercial aircraft from Miami, Florida, to Havana, Cuba, in 1921, and then to Egypt when Tutankhamun's tomb was opened in 1923.
Split into simpler sentences: As a teenager he was in the elite when he traveled by commercial aircraft from Miami, Florida, to Havana, Cuba, in 1921. And then to Egypt when Tutankhamun's tomb was opened in 1923.