North and South Korea have been separated by a heavily fortified border since the Korean War that began 75 years ago ...

The Korean War began with a surprise invasion by North Korean forces, who crossed the 38th parallel in a full-scale assault ...

They became the stuff of Second Amendment lore — young men with firearms, patrolling the streets and positioned on rooftops ...

The two Koreas have engaged in psychological warfare since the 1960s, with weapons like huge billboard screens, loudspeakers ...