North Korea 's fax to South Korea : Will `` strike mercilessly without notice '' . Earlier this week , on the second anniversary of the death of former North Korean leader , Kim Jong Il , conservative protesters rallied in Seoul , burning effigies of the country 's leaders as well as its flag . North Korea routinely threatens to strike after what it calls `` provocations ''
North Korea 's fax to South Korea : Will `` strike mercilessly without notice '' . North Korea routinely threatens to strike after what it calls `` provocations ''