核安全峰会着重朝鲜和伊斯兰国问题

U.S. President Barack Obama will speak Friday at the end of the second and final day of the nuclear security summit in Washington attended by world leaders.

The U.S. leader said Thursday that in the wake of attacks in places including Brussels, there is “not only great urgency around the nuclear issue but eliminating generally the scourge of terrorism.”

Obama’s fourth and final nuclear summit has come at a time of heightened concern about the possibility that Islamic State militants could set off radioactive bombs, and also about North Korea’s nuclear weapons development.

At a State Department ministerial level dinner, Secretary of State John Kerry said there have been times when nuclear security progress has been slow, and there remains an “enormous amount more to do. But every step forward that we take is a step away from danger."

Earlier Thursday, Obama held a series of meetings with leaders. He met with South Korean President Park Geun-hye and Japanese Prime Minister Shinzo Abe to discuss the North Korean threat following Pyongyang\'s January nuclear test and a long-range missile launch in February.

Pyongyang also was among the focal points when Obama sat down later with Chinese President Xi Jinping.

"We want to enhance communication and coordination on the Korean nuclear issue and other regional and global issues," said Xi at the start of the talks.

Washington views Beijing, Pyongyang\'s ally, as key in enforcing U.N. sanctions against North Korea for its weapons development.

奥巴马总统星期四表示，布鲁塞尔等地发生袭击后，亟待解决的问题不仅是核安全，而且还有根除恐怖主义。

这是奥巴马总统任内举行的第4次、也是最后一次核安全峰会。目前，伊斯兰国激进分子可能施放放射性炸弹，以及朝鲜发展核武器等问题都让外界日益紧张。

在美国国务院举行的部长级工作晚餐上，美国国务卿克里说，实现核安全的进展有时非常缓慢，还有大量工作要做。但克里表示，每向前迈进一步，就是离危险远了一步。

星期四早些时候，奥巴马与一些国家领导人进行了一系列会晤。奥巴马会见了韩国总统朴槿惠和日本首相安倍晋三，讨论平壤今年1月核试验和2月试射远程导弹所构成的威胁。

奥巴马晚些时候还会见了中国国家主席习近平，朝鲜核项目问题也是双方的讨论重点。

习近平一上来就说，“我们希望在朝鲜核问题以及其他地区和全球问题上加强联络与合作。”

华盛顿认为，北京作为朝鲜盟友，是联合国制裁朝鲜措施能否落实的关键因素。