SYDNEY — Australia and Vanuatu have agreed to a 10-year deal, aimed at strengthening security and economic ties, worth A$500m ($328m; £241m).The so-called Nakamal agreement – the result of months ofSYDNEY — Australia and Vanuatu have agreed to a 10-year deal, aimed at strengthening security and economic ties, worth A$500m ($328m; £241m).The so-called Nakamal agreement – the result of months of