Venezuela says 'attempted coup' under way

Venezuelan opposition leader and self-proclaimed acting president Juan Guaido said on Tuesday that troops had joined his campaign to oust President Nicolas Maduro as the government vowed to put down what it called an attempted coup.Hundreds of people, many waving Venezuelan flags, flocked onto a highway near a Caracas military base, and police responded with tear-gas as some of the demonstrators broke away to throw rocks at security forces.The government said it was "deactivating" an attempted c