Venezuelan opposition leader calls for strikes to oust the president

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The Venezuelan opposition leader Juan Guaido has called for an escalating series of strikes as part of his campaign to oust President Nicolas Maduro. The British Defence Secretary Gavin Williamson has been sacked over information leaked from a National Security Council meeting about the Chinese telecom giant Huawei. Scientists in Australia believe they've found an antidote to a sting from the world's most venomous creature the box jellyfish.