Korean trains

Kosung, South Korea: South Korean military police open the border to allow a train from North Korea to enter the country. Photograph: Jeon Heon-Kyun/EPA

Panmunjom, North Korea: North Korean (l) and South Korean soldiers stand guard during negotiations to finalise details of the border crossings. Photograph: Pool

Mount Kumgang, North Korea: North and South Koreans board a train headed for Chejin station in South Korea. Photograph: Pool

Munsan, South Korea: The South Korean train leaves Munsan station, bound for the North Korean city of Kaesong. Photograph: Stringer/EPA

Kosung, North Korea: The North Korean train passes through the gate to the demilitarised zone (DMZ) between the two countries. Photograph: Jeon Heon-Kyun/EPA

Paju, South Korea: The South Korean train approaches the DMZ from the opposite direction. Photograph: Chung Sung-Jun/Getty

Kosung, North Korea: Middle school students cheer the arrival of the South Korean train at Kumgangsan Youth railway station. Photograph: Pool/AP

Kosung, South Korea: A North Korean train attendant in the DMZ. Photograph: Seokyong Lee/Pool/EPA

Kosung, South Korea: A South Korean train conductor (l) shakes hands with a North Korean train conductor at Jejin station in the DMZ. Photograph: Han Myung-Gu/EPA