South Korea's Foreign Minister Kang Kyung-wha has hinted at the possibility of a trilateral summit between Seoul, Pyongyang, and Washington,... on the sidelines of the UN General Assembly in September.<br /> Kang told reporters during her first visit to the U.K. since taking her post,... that she can't rule out the possibility of trilateral talks.<br />And when asked about whether they will formally end the Korean War at the UN gathering,... Kang said.... she can't say for sure, but diplomatic efforts will be made.<br />She added that.... it could be discussed on the sidelines of the ASEAN Regional Forum.... if Pyongyang attends the forum which takes place in two weeks.<br />Kang also reiterated that North Korea's denuclearization is a common goal that must be achieved,... no matter how long it may take. <br />