[A North Korean woman on a bus weeps as she holds her South Korean relative's hand after the Separated Family Reunion Meeting at Diamond Mountain in North Koreaon Tuesday. The first reunions of North and South Koreans in more than three years have been held in North Korea. Image via Yonhap, Lee Ji-eun/AP/KOREA OUT.]

Two friends who first met at a party four years ago received the shock of a lifetime after a random Facebook status update posted by one of them led to the realization that they're closely related.