Five things you need to know today

Olympic winners and losers, Donald Trump’s corporation tax and a possible school strike

Irish Olympics tickets

The Olympic Council of Ireland (OCI) says it is investigating how an Irish man arrested in Brazil was allegedly illegally selling Olympic Games tickets earmarked for the organisation.

Donald Trump tax

Donald Trump has Ireland in his sights as he announces a series of tax cuts aimed at luring US companies home. In the most detailed account of his economic plans, the Republican presidential nominee said no US firm would pay more than 15 per cent of its profits in tax.

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Rio 2016

Old rivalries were to the fore last night as America's Lily King squared off against Russia's Yulia Efimova in the 100 metre breaststroke final. The Russian was booed as the confrontation highlighted the bitter antipathy over her country's participation in the 2016 games and the debate over whether Olympic sports can be believed.

School’s out for longer (maybe)

Hundreds of secondary schools could close next month unless demands to improve teachers' pay and conditions are met, a teacher's union has warned. The move is in response to the Government's decision to apply financial penalties on teachers who voted to stop working additional hours.

Bogus marriages

A High Court judge has said the Government has a "clear duty" to try to cut the number of sham marriages taking place by people who are trying to prevent being deported. Mr Justice Richard Humphreys' call was made as he rejected an attempt by an Algerian man to block his removal from the State because he had married a Hungarian woman.

And finally...

Fintan O'Toole hates this fake Olympics of phoney winners. Give him Jim Hogan, the Irishman who attempted to chase Ethiopian Abebe Bikila for gold in the 1964 Tokyo Olympics marathon and nearly died.