Newly appointed US ambassador to Japan Caroline Kennedy shakes hands with Kunisuke Nakashima, commander of Japan's Air Defense Command, as she arrives at Japan's Air Defense Command headquarters in Yokota Air Base on the outskirts of Tokyo November 21, 2013. Caroline Kennedy, daughter of slain US President John F. Kennedy, arrived in Japan to take up her first high profile job in public office, making a late start to a political career for which her family is renowned. [Photo/Agencies]