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Lithuanian Prime Minister Saulius Skvernelis, Polish Prime Minister Mateusz Morawiecki, Latvian Prime Minister Krisjanis Karins, and Estonian Prime Minister Juri Ratas (from L to R) pose for a photo during their meeting in Riga, Latvia, on Dec. 6, 2019. The prime ministers of the three Baltic states and Poland met here on Friday to discuss progress on the regional rail infrastructure project Rail Baltica amid concerns about delays in the project's implementation. (Photo by Janis/Xinhua)