This is a summary. To read the whole story subscribe to BostonGlobe.com
THE HAGUE — Japan will hand over to the United States more than 700 pounds of weapons-grade plutonium and a supply of highly enriched uranium — a victory for President Obama’s efforts to secure nuclear materials around the world.
American and Japanese officials announced the deal Monday at a two-day nuclear security summit in The Hague — the meeting’s first major breakthrough.
‘‘This is a very significant nuclear security pledge and activity,’’ US Energy Secretary Ernest Moniz told reporters in The Hague. ‘‘The material will be transferred to the United States for transformation into proliferation-resistant forms.’’
Japan said handing over the highly enriched uranium and plutonium is part of its efforts to prevent proliferation and possible abuse of nuclear material by terrorists.