Taken from CNBC’s Daily Open, our international markets newsletter — Subscribe today Amid the recent uproar over U.S. President Donald Trump's aim of annexing Greenland, it's easy to lose track of another geopolitical tension that's been raging on the European continent for nearly 4 years: the Russia-Ukraine war. On Friday, Ukrainian, Russian and U.S. ambassadors will hold trilateral talks in the United Arab Emirates that will last until Saturday. Notably, Europe won't be involved in the

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