Obama made the remarks on Thursday in a meeting with Japanese Prime Minister Shinzo Abe and South Korean President Park Geun-hye on the sidelines of the Nuclear Security Summit at the Walter E. Washington Convention Center in Washington, DC.US President Barack Obama and Chinese President Xi Jinping presented a united front in trying to halt North Korea’s nuclear weapons program, but publicly admitted to ongoing “disagreement” over territorial disputes in the South China Sea. I also have ruled out developing new nuclear warheads and narrowed the contingencies under which the United States would ever use or threaten to use nuclear weapons.Then Obama met Chinese President Xi Jinping and both called for North Korea to give up its nuclear weapons. A nuclear arms race is no near-term risk in Northeast Asia, but a potential topic of concern that highlights the importance and urgency of weaning Kim off his nuclear ambitions. But it hasn’t taken effect because it needed ratification from two-thirds of the countries. The International Atomic Energy Agency has said the strengthened agreement will reduce the likelihood of terrorists getting their hands on nuclear materials.”I warn once again that the global community will by no means condone North Korea’s provocation, and that should it choose to undertake yet another provocation, it is certain to find itself facing even tougher sanctions and isolation”, Park said at the trilateral summit, apparently referring to North Korea’s possible nuclear test.In a more recent example, a nuclear security center of excellence (COE) jointly financed and built by the Chinese and US governments was inaugurated in suburban Beijing on March 18.In recent weeks, North Korea has carried out a hydrogen bomb test and has repeatedly test-fired missiles while making threats to the West.President Barack Obama has admitted that foreign leaders often ask about the shrill tone of the 2016 campaign to replace him.”The entire premise of American foreign policy as it relates to nuclear weapons for the last 70 years has been focused on preventing the proliferation of nuclear weapons to additional states”, Rhodes said. They require mandatory inspections of all North Korean cargo and ban the export of most of the country’s mineral trade that has been used to fund its nuclear development program.China has backed fresh United Nations sanctions against Pyongyang for testing a nuclear missile and President Xi said there was “effective communication and coordination on the Korea nuclear issue”.Xi will want the U.S.to restart negotiations with the North, although the prospects appear slim unless sanctions bite and the North makes nuclear concessions.Rhodes noted that USA officials have always been talking with Chinese, Japanese, and South Korean officials about the threat posed by North Korea, and “we’re in discussions about the deployment of additional missile defense” in the area.Obama launched the semiannual Nuclear Security Summit in 2010, which seeks to enhance and help bolster many nations’ domestic measures against nuclear threats.President Obama also pointed out the plight of North Korea suffering severely because of human rights abuses. The summit continues on Friday with a special session focused on preventing IS and other extremists from obtaining nuclear materials and attacking urban areas.The Brussels attacks and news that the terrorists secretly filmed a Belgian nuclear official has horrified national security officials, raising fears of a “dirty bomb” plot by the Islamic State group. The White House explained on Thursday that providing data about metric tons of enriched uranium owned by the USA, can “increase transparency without revealing sensitive information”.