Article: The Baltic Way or Baltic Chain (also Chain of Freedom Estonian: Balti kett, Latvian: Baltijas cels, Lithuanian: Baltijos kelias, Russian: ) was a peaceful political demonstration on August 23, 1989. An estimated 2 million people joined hands to form a human chain extending 600 kilometres (370 mi) across Estonia, Latvia and Lithuania, which had been forcibly reincorporated into the Soviet Union in 1944. The colossal demonstration marked the 50th anniversary of the MolotovRibbentrop Pact that divided Eastern Europe into spheres of influence and led to the occupation of the Baltic states in 1940.

Question: How long was the chain?
600 kilometres