美国的亚洲盟友所得到的第二次警报是中国单方面设立了防空识别区。 该区域覆盖了中国所主张（但未控制）的东海领空，是国际关系中的一次危险先例。
America’s Asian allies received a second wake-up call when China unilaterally established an air defense identification zone (ADIZ) covering territories that it claims (but does not control) in the East China Sea – a dangerous new precedent in international relations.