North Korea has expressed regret over two South Korean border guards injured by a landmine blast and promised to make efforts to prevent a similar incident from happening again, according to South Korea's National Security Office Chief Kim Kwan-jin. The North also decided to withdraw its declaration of "quasi-state of war" against Seoul, he said. In return, South Korea will turn off its frontline loudspeakers blaring anti-North messages from Tuesday noon on the condition that the North will not make any "abnormal" behavior. The two Koreas also agreed to host the reunions of families separated by the 1950-53 Korean War...