As leaders from nearly 50 countries meet in Washington for a major summit on Nuclear Security, Ukraine has pledged to eliminate stockpile of highly enriched uranium by 2012.

来自世界上接近50个国家的领导人在华盛顿参加核安全峰会，乌克兰承诺2012年之前消除高浓缩铀。

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We are going to set up more concrete benchmarks, and as a result of the Seoul summit, we will be able to reduce and eliminate about 20, 000 nuclear weapons.

WHITEHOUSE: President Obama and President Lee Hold a News Conference

And to prevent terrorists from acquiring nuclear weapons, we came together at our Nuclear Security Summit, where our two nations made numerous commitments, including agreeing to eliminate enough plutonium for about 17, 000 nuclear weapons.

WHITEHOUSE: President Obama & President Medvedev Joint Press Conference | The White House

Belarus has agreed to eliminate all its stocks of highly enriched uranium by the time of the next nuclear security summit in 2012.

WHITEHOUSE: Press Briefing