World leaders gather in The Hague for two days of nuclear security talks starting Monday.<br/> <br />A G7 meeting was also hastily added to the agenda to give leaders a chance to discuss a response to Russia's annexation of Crimea.<br/> <br />Before the summit, U.S. President Barack Obama and Chinese President Xi Jinping pledged cooperation between their countries.<br/> <br />(SOUNDBITE) (English) CHINESE PRESIDENT XI JINPING SAYING:<br/> <br />"I wish to emphasize that China is firmly committed to... building a new model of major country relations. We are committed to our position of no confrontation, no conflict, mutual respect, and win-win cooperation with regard to the United States."<br/> <br />Obama said the U.S.-China relationship was as important as any in the world, and that they could work through their differences.<br/> <br />(SOUNDBITE) (English) UNITED STATES PRESIDENT BARACK OBAMA SAYING:<br/> <br />"We're also able to work through frictions that exist in our relations around issues like human rights, deal
