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A South Korean liberal activist waves the "reunification flag" painted the Korean Peninsula during a rally to welcome Reverend Han Sang-Ryol, at the Imjingang railway station near a military-controlled bridge leading to Panmunjom in Paju, north of Seoul, on August 20, 2010.  A South Korean pro-unification activist was arrested when he crossed the tense border from North Korea after visiting Pyongyang without Seoul's permission.  AFP PHOTO/PARK JI-HWAN (Photo credit should read PARK JI-HWAN/AFP/Getty Images)
A South Korean liberal activist waves the "reunification flag" painted the Korean Peninsula during a rally to welcome Reverend Han Sang-Ryol, at the Imjingang railway station near a military-controlled bridge leading to Panmunjom in Paju, north of Seoul, on August 20, 2010.  A South Korean pro-unification activist was arrested when he crossed the tense border from North Korea after visiting Pyongyang without Seoul's permission.  AFP PHOTO/PARK JI-HWAN (Photo credit should read PARK JI-HWAN/AFP/Getty Images)

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    North, South Korea to march under unified flag

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North, South Korea to march under unified flag

North and South Korean athletes will march together at the Winter Olympics opening ceremony under a unified flag in a diplomatic breakthrough following days of talks between the two countries.

North, South Korea to march under unified flag

North and South Korean athletes will march together at the Winter Olympics opening ceremony under a unified flag in a diplomatic breakthrough following days of talks between the two countries.