berne neutral switzerland prepare act mediator help resolve north korea crisis include host ministerial talk swiss president doris leuthard say monday leuthard say swiss troop deploy demarcation zone south korea north korea note country along sweden long history neutral discreet diplomacy include switzerland represent u.s. interest iran cuba china unite state take share responsibility add warn over-reactions north sixth large nuclear test sanction change many things term convince pyongyang abandon weapons program even though population suffer leuthard say think really time dialogue tell news conference berne ready offer role good service mediator think upcoming weeks lot depend u.s. china influence crisis think switzerland sweden role behind curtain part task would find suitable location officials perhaps countries foreign minister meet say think role look kind possibilities find well twitter adequate instrument ... must discreet note communist party congress north korea neighbor ally china due take place october leuthard say time initiatives ideal perhaps also part plan north korea north korean leader kim jong un spend part youth berne study assume name framework agreement north korea unite state clinton administration clinch 1994 geneva long negotiations deal pyongyang freeze construction nuclear reactors suspect part covert weapons program exchange two light water nuclear reactors unravel 2003. north korea worry situation small country perhaps could meet switzerland find political solution one arm leuthard say swiss ready mediate north korea crisis