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INCHEON, SOUTH KOREA - FEBRUARY 04:  South Korean peace activists carry the Flag of Korean Peninsula before the Women's Ice Hockey friendly match at Seonhak International Ice Rink on February 4, 2018 in Incheon, South Korea. The friendly match is held ahead of the Olympic Games where South and North Korea competes for the first time as a unified team in a sport at the Olympic Games.  (Photo by Woohae Cho/Getty Images)
INCHEON, SOUTH KOREA - FEBRUARY 04:  South Korean peace activists carry the Flag of Korean Peninsula before the Women's Ice Hockey friendly match at Seonhak International Ice Rink on February 4, 2018 in Incheon, South Korea. The friendly match is held ahead of the Olympic Games where South and North Korea competes for the first time as a unified team in a sport at the Olympic Games.  (Photo by Woohae Cho/Getty Images)

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The Koreas: Divided by war, united by a flag?

North and South Korea have marched under one flag no fewer than seven times since 1991. Will the 2018 Winter Olympics in PyeongChang be any different?

The Koreas: Divided by war, united by a flag?

North and South Korea have marched under one flag no fewer than seven times since 1991. Will the 2018 Winter Olympics in PyeongChang be any different?