(CNN) -- At 3.30 p.m. on Wednesday, a phone rang in a room in an uninhabited village in the demilitarized zone separating North and South Korea.
For the first time since February 2016, the North was calling the South.
And South Korea answered.
Little is known about the contents of the 20-minute call, which ended at 3:50 p.m. South Korean time (which is half an hour ahead of North Korean time).
The South Korean Ministry of Unification simply said the two sides "checked t
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