Cristina Fernandez de Kirchner, Argentina's president, is using her refusal to appoint an ambassador to Britain as demonstration of her hardline on the Falkland Islands, a key plank of her platform for election in October. Tensions over the sovereignty of the Falklands have increased since British companies began drilling for oil in the region just over a year ago. Argentina responded last August by abandoning plans to install a new ambassador in London and reports in Buenos Aires now indicate that none will be appointed this year. Political analysts said the decision suggested that President Cristina Fernández de Kirchner could...