<span style="color: #222222;">South Korea and the United States are planning joint exercises involving American nuclear assets. South Korean President Yoon Suk-yeol stated this in an interview with a national daily.<br />''<br />'' Mr Yoon's statement about South Korea's plan for joint nuclear exercises with the US comes amid North Korea's attempt to intensify its missile testing programme and expand its nuclear arsenal.<br />''</span><br />''South Korean President said, the joint exercises will aim to ensure more effective implementation of the US "extended deterrence" and improve the US military's ability to deter a possible attack by North Korea or its sponsor China. <br />''<br />''Mr Yoon said, nuclear weapons belong to America, but planning, information sharing, exercises, and training should be conducted collaboratively by South Korea and the United States.<br />''<br />''<span style="color: #222222;">Earlier, North Korea's ruler Kim Jong Un stated that his country plans to develop new intercontinental ballistic missiles and expand its nuclear arsenal to counter the US.</span><br />