Pro-Russian separatists in southeastern regions are demanding referendum on a split with Ukraine the same kind of vote that took place last month in Crimea after Russian troops took control there. Scott Stearns, VOA News at the State Department. U.S. Defense Secretary Chuck Hagel is warning the U.S. will defend its Asian allies in the event of any conflict with China following talks in Beijing Tuesday with his Chinese counterpart Chang Wanquan.____________________\"Every nation has a right to establish air defense zones, but not a right to do unilaterally with no collaboration, no consultation. That adds to tensions, misunderstandings and could eventually add to and eventually get to a dangerous conflict.\" The territorial disputes and corresponding tensions would remain focus for Secretary Hagel\'s three-day visit to China. 乌克兰东南部地区的亲俄分裂分子要求,就该地区从乌克兰分离出去的问题举行全民公投.这简直就是上个月克里米亚在被俄军控制后举行公投的重演.斯科特`斯腾斯,美国之音新闻,国务院报道. 美国防长查克黑格尔查克哈格尔周二在北京与中国防长常万全举行会谈.会后哈格尔发出警告,无论美国的亚洲盟友与中国发生任何冲突,美国都将维护它的盟友._____________________\"各国有权建立防空区,但无权不通过协作,不经过商谈,单方面这样做.这会使局势更加紧张,导致误解加深,并可能最终促使局势朝危险的冲突方向发展.\" 领土争端和随之而来的紧张局势仍将是哈格尔中国三日行的重点议题.