The government is running a ` ` smear campaign '' against its neighbor - North Korean state media . South Korea is scheduled to host a high - profile nuclear security summit . US President Barack Obama will be among more than 50 heads of state at the meeting . He will visit the demilitarized zone between South and North Korea for the first time Sunday .
The South is running a `` smear campaign '' against its neighbor - North Korean state media . South Korea is preparing to host a high-profile nuclear security summit . U.S. President Barack Obama will be among more than 50 heads of state at the meeting . He will visit the demilitarized zone between South and North Korea for the first time Sunday .