He said, if elected, he would visit rival North Korea before making a trip to South Korea's main ally, the United States.
President's disapproval rating is at 93 percent after weeks of demonstrations over an influence scandal.
U.S.-led United Nations command HQ offers lessons to 29 children in the heavily fortified zone between South and North Korea.
Scandals have put the current president of South Korea's approval rating to below five percent.
Park Geun-hye’s office said the pills were for altitude sickness.
The president is down to a 5 percent approval rating after being engulfed in an influence scandal.
Choi Soon-sil is accused of using her friendship with President Park Geun-hye to influence state affairs.
South Koreans 'not really afraid' of North's tests after years of aggressive provocations.
Friday's test was confirmed after reportedly causing a 5.3 magnitude earthquake.
Pyongyang has warned against a U.S.-South Korea military drill.
Pyongyang claimed to have sent a friendly letter to the Kremlin.
The Russian president will welcome Park Geun-hye in Vladivostok.
North Korea's attempt to launch a ballistic missile comes two days after issuing threats over Washington's blacklisting of Kim Jong Un for human rights abuses.
The two vessels from the North retreated after the South fired five 40 mm artillery shots.
The U.S and South Korea have begun talks on possible deployment of a new anti-missile system.
The North Korea rocket crashed just moments after takeoff.
South Korea, experts fear the North may conduct its fifth nuclear test 'at any time.'
The colonel worked for the North Korean military's General Reconnaissance Bureau.
The video comes 10 days after a similar cinematic assault on Washington, D.C.
On Friday, tension between South Korea and North Korea came to a head.