With a single step, Kim Jong Un broke with decades of hostility and distrust to become the first North Korean leader to cross into South Korean territory since 1953.
It marked the beginning of a landmark summit, the first meeting of the leaders of North and South Korea in over a decade, with broad implications for the world.
Shaking hands with Moon Jae-in, while standing in the demilitarized zone (DMZ) dividing the two countries, Kim told the South Korean President he felt the weight of meeting at "such a historic location."
"It was a very courageous decision for you to come all the way here," Moon replied.The highly-choreographed summit is the result of months of diplomatic talks between the North and the South and every moment has been laden with symbolism and history by organizers.
But in a rare unscripted moment right after their first meeting on the demarcation line, Kim invited Moon to step into the northern side of the DMZ. "Maybe this is the right time for you to enter North Korean territory," Kim said to Moon, who took him up on the invitation.