NEW YORK - Given China's increasing power and economic security, dealing with the Beijing poses a "big challenge" for the United States, former Secretary of State Henry Kissinger said Sunday. Kissinger was national security advisor in President Richard Nixon's administration, and almost 40 years ago he made a secret trip to confer with the Chinese, a voyage that paved the way for the normalization of relations between Washington and communist China. He recently has written a book, "On China," and appeared Sunday on CNN's "Fareed Zakaria GPS."