The White House said that President Donald Trump will meet the leaders of Japan and South Korea in New York next week to discuss the urgent threat posed by North Korea. <br/><br/>Trump's National Security Adviser H.R. McMaster told at a White House briefing that the President will host a lunch with Japanese Prime Minister Shinzo Abe and South Korea's Moon Jae-in on Thursday on the sidelines of the UN General Assembly.He said the US retained a military option in dealing with North Korea. <br/><br/>McMaster said North Korea's recent launch demonstrates that it is one of the world's most urgent and dangerous security problems, he added. The US ambassador to the UN, Nikki Haley, said trade with North Korea would be cut 90 percent after the massive sanctions package agreed by the Security Council.