US Secretary of State Hillary Rodham Clinton arrived in Australia on Tuesday before a summit about deepening defense links between Australia and the United States. US Defense Secretary Leon Panetta is scheduled to arrive later. They’ll meet with Prime Minister Julia Gillard on Tuesday and with Defense Minister Stephen Smith and Foreign Minister Bob Carr the next day. The annual summit is the first since President Barack Obama visited Australia a year ago and riled China by announcing that up to 2,500 US Marines would rotate through a joint military training hub in northern Australia.—AP