The announcement came shortly before U.S. Defense Secretary Leon Panetta boarded a flight to Beijing where he faced a number of challenges from the Chinese leadership that is suspicious about Washington's new strategy that includes pivot forces to the Asia-Pacific region. Panetta made it clear the radar system in Japan is directed at North Korea, not China.在美国国防部长帕内塔飞往北京之前,已明确表示日本的雷达防御系统旨在应对来自朝鲜方面的威胁,而不是中国.由于中国领导人对华盛顿提出的着重亚太地区的武装力量的新策略表示怀疑,帕内塔北京之行面临着巨大的挑战. ______________________________________.