North Korea 's response to South Korea : ' ` ` strike mercilessly without notice '' Protests in Seoul were held over Kim Jong Il 's second anniversary of death . North Korea routinely threatens to strike after what it calls ` ` provocations ''
North Korea 's fax to South Korea : Will `` strike mercilessly without notice '' Protests in Seoul were held over Kim Jong Il 's second anniversary of death . North Korea routinely threatens to strike after what it calls `` provocations ''