of summit from 47 countries today with Chinese President Hu Jintao, both leaders agreed to cooperate on UN resolution on new sanctions program nuclear Iran.

The Chinese government is "prepared to work with us," said the White House.

More cautious, however, was the spokesman of the Chinese government, Ma Zhaoxu, who said at the meeting Hu Obama sent the desirability of continuing the negotiations and dialogue to resolve the Iranian crisis.

Over recent months China has been reluctant to impose new sanctions, but finally agreed to be present at the talks in New York, which has been interpreted as a U.S. diplomatic victory.

In addition to Hu, the U.S. president spoke today with their colleagues from Ukraine, Viktor Yanukovich, and Armenia, Serzh Sargsian and the King Abdullah II of Jordan, which stressed the need for Israelis and Palestinians resume peace negotiations, and Malaysian Prime Minister Mohamed Abdul Razak.

After the meeting with Yanukovich, the White House reported that Ukraine decided to resign within two years to their highly refined uranium, about ninety kilos, which is enough to make several bombs nuclear is.

Through the agreement, U.S. provide technical and financial assistance necessary to carry out the project.

According to White House spokesman, Robert Gibbs, the announcement represents a major victory for the U.S., trying to "ten years" to ensure that Ukraine give up this material.

Following the bilateral events, Obama welcomed the leaders at a reception ceremony which lasted about an hour and a half, before continuing with a working dinner which was officially opened summit .

Present at the dinner meeting were, among others, the leaders of Brazil, Mexico, Argentina, Chile, Spain, China, France, Italy, Germany, Russia, India and Japan.

The summit is the largest international event sponsored by a U.S. president since 1945 and one with which the White House wants to draw attention to terrorism nuclear , Which Washington considers the greatest threat to global security.

"The threat of terrorism nuclear is real, serious and growing ", said the chief counterterrorism adviser to the White House, John Brennan, who said that Al Qaeda has spent years trying to make a weapon nuclear .

For his part, U.S. Vice President Joe Biden, said during a working lunch with about a dozen leaders of developing countries are required only 22 kilos of high-purity uranium for a bomb that could destroy any of the downtown area great world capitals and kill "tens or hundreds of thousands of individuals."

To prevent this from happening, the assembled countries seek to implement a work plan to ensure all material nuclear existing in the world and prevent, so that Al Qaeda and similar groups are made with refined enriched uranium or plutoniu

Around this goal will focus the talks tomorrow in the Washington Convention Center, venue of the meeting, which will be held two plenary meetings and a working lunch that will conclude with the disclosure of a joint statement.

Obama also found time to talk in respective bilateral Turkish President Recep Tayipp Erdogan and German Chancellor Angela Merkel.

In addition he will also meet behind closed doors, with the president of Argentina, Cristina Fernandez de Kirchner, the only Latin American leader with whom bilateral maintained in this summit .

The Washington meeting comes after the historic arsenal reduction nuclear agreed between the U.S. and Russia and after the Obama Administration will ensure, as part of its new strategy nuclear That only atomic bombs used in "extreme circumstances."

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