Never-before-seen photos of Kim Jong-un show the North Korean leader as a young boy.
In one photo, he salutes in military garb. In another, he is smiling into the camera.
The photos were projected on a screen during a concert and televised on the state-run station Korean Central Television, reports The Telegraph.
Kim's face as a child contrasts with the sharp warning from South Korea that their neighbors to the north could be preparing an atomic test.
Seoul defense ministry spokesman Kim Min-seok said Tuesday that North Korea has threatened something "unimaginable" for its enemies.
President Obama is visiting South Korea on April 25.