Benjamin Netanyahu says he has retained leadership of Israel's governing Likud party

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Israel's prime minister, Benjamin Netanyahu, has claimed victory over his rival, Gideon Saar, in an internal election for the leadership of the governing Likud party. President Racip Erdogan says Turkey will send troops to troubled Libya following a request made by the United Nations-backed government in Tripoli for military support to defeat rival forces from the east of the country. Astronomers are warning that thousands of communications satellites due to be blasted into space next year could impede their research.