US President Barack Obama (R) shakes hands with Governor-General Quentin Bryce as he arrives in Canberra on November 16, 2011. US President Barack Obama arrived in Australia on a twice-postponed mission to update a 60-year-old security alliance for a new century marked by the rise of China. AFP PHOTO / POOL / Rick Rycroft (Photo credit should read RICK RYCROFT/AFP/Getty Images)