SEOUL: Kim Jong Un has agreed to hold a second summit with US President Donald Trump as soon as possible, Seoul said on Sunday, after Washington’s top diplomat held "productive" talks on denuclearisation with the North Korean leader in Pyongyang.US Secretary of State Mike Pompeo met with Kim on Sunday morning for around two hours of talks followed by a lunch in the North’s capital, before flying to Seoul on a whirlwind diplomatic visit to the region.Pompeo said "he agreed with Chairman Kim...