evidence: South Korean President Moon Jae-in was waiting to greet him at the military demarcation line that has long divided the two Koreas. The two leaders shook hands at the line, and then, in a symbolic move, Moon joined Kim on the northern side of the line before they crossed into the southern side together. [...] People watch live footage of the meeting from a railway station in Seoul, South Korea. An audible gasp ran through the room as Kim walked down the steps towards the military demarcation line, followed by a loud cheers and applause from South Koreans in the room as the historic handshake took place and Kim stepped onto the south side. Jung Yeon-je/AFP/Getty Images [...] A South Korean man weeps in Seoul as he watches Kim cross the military demarcation line. Woohae Cho/Getty Images