Shen Dingli, an expert on arms control at Fudan University in Shanghai, tells the newspaper that the UN should not hold back on sanctions but says the international community, especially the US, should give security guarantees to Pyongyang and keep the door to negotiations open.

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Our Homeland Security Secretary will give us an update on the overall situation.

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It is also to prevent the government -- give safe space to the Afghan government as it continues to take control, and to give us a time to train up Afghan national security forces, which we are doing.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney

The close relationship between our two countries extends beyond just the nuclear security issue, so this meeting will give us an opportunity to discuss the cooperation that we have built over the last several years with respect to Afghanistan and the help we've received in supplying our troops and helping to assist the Afghan government.

WHITEHOUSE: President Obama��s Bilateral Meeting with President Nazarbayev of Kazakhstan | The White House

It is enough to give us a historic opportunity to strengthen the country's safety net by putting Social Security on a sound financial footing for generations to come.

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We will require national security reporters who are interested in background, substance and fact, and who can give us better news stories, better essays, better features.

CENTERFORSECURITYPOLICY: 2001 Mightier Pen Award

And I want to stress very strongly that the words that I heard from him today give us the sense that together we work also for the sake -- for the purpose of Polish security.

WHITEHOUSE: President Obama and Prime Minister Tusk Press Conference