Ms. Haddon, who carved a path all her own in the modeling world, was found dead on Friday morning from what authorities believed was a carbon monoxide leak.

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The person, who boarded the flight without a ticket, was detected as the plane was preparing to take off for Hawaii on Christmas Eve.

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The cause of the injuries was yet unknown. The episode on Friday night came days after a woman was fatally burned at another subway station in New York City.

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