Complex sentence: Another Slayton surprise was a gift of three miniature bottles of brandy, that Borman ordered the crew to leave alone until after they landed; and they remained unopened, even years after the flight.
Split into simpler sentences: Another Slayton surprise was a gift of three miniature bottles of brandy, that Borman ordered the crew to leave alone until after they landed. They remained unopened, even years after the flight.