North Korea reopened a border hotline with South Korea yesterday restoring a channel of direct dialogue and signaling a possible thaw in relations between the two rivals after months of acrimony and fears of war.<br/><br/>The return of the telephone hotline at the village of Panmunjom came two days after North Korea's leader, Kim Jong-un, made a rare overture to the South. The village falls in the Demilitarized Zone which is the world's most heavily guarded border