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German Chancellor Angela Merkel (3rd R) and French President Emmanuel Macron (3rd L) sign the treaty of Aachen to renew friendship and cooperation between the two countries in Aachen, Germany, on Jan. 22, 2019. The treaty seeks closer cooperation between Germany and France in economic, defense and European policy. The treaty of Aachen ties in with the Elysee treaty, signed in 1963. (Xinhua/Lu Yang)
