North Korea holds live-fire drill on maritime border
A North Korean soldier looks through binoculars at the South side across the Demilitarized zone (DMZ) dividing the two Koreas on July 27, 2013 [AFP]

North Korea held a live-fire drill near its maritime border with South Korea on Tuesday, with Seoul vowing a "strong" response if any shells fall on its side of the disputed boundary. A similar exercise a month ago resulted in the two rivals firing…