Stranded window washers hang on the side of 1 World Trade Center in New York 12 November 2014
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World Trade Center: Secrets of a skyscraper window cleaner

After two window cleaners endured a terrifying ordeal 68 storeys above the ground at the World Trade Center, many watching around the world wondered who would do such a dangerous job.

Juan Lizama and Juan Lopez held onto the nearly vertical platform for almost two hours after a cable holding the platform malfunctioned.

The pair were eventually rescued after firefighters cut a hole in the glass.

The BBC spoke to Andy Horton, a veteran window cleaner and safety trainer in New York, about the dangers of working hundreds of feet above the city streets.

Produced by the BBC's Anna Bressanin.

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