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Historic peace agreement between North, South Korea

'We should be optimistic, but not euphoric...we've seen this movie before,' warns Thomas Countryman, former Under Secretary for Arms Control and International Security at the the U.S. State Department.
'We should be optimistic, but not euphoric...we've seen this movie before,' warns Thomas Countryman, former Under Secretary for Arms Control and International Security at the the U.S. State Department. 8:25