IOC President Pat Hickey's arrest in Rio is the latest twist in a tangled story. Business Affairs Correspondent Mark Paul and our editor Cliff Taylor explain what we know about the links between the companies, organisations and individuals invovled in the Olympic ticket scandal. Mark has also been reporting this week on Special Purpose Vehicles, a type of company that is being used to avoid billions in tax in this jurisdiction - while employing practically no-one. He tells us how it all works and how they could be concealing a big problem. Another type of vehicle with no-one working in it is the driverless taxi, which is in the pinelines and expected to be on the streets by 2020 according to an announcement by Ford. Our motoring expert Michael McAleer pops in to update us on the race between tech and car firms to put the first popular driverless cars on our streets.

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