Vice President of the Council of State of Cuba, Salvador Valdes Mesa (R, front) and U.S. President Barack Obama(L, front), take part during a ceremony at Revolution Square, in Havana, capital of Cuba, on March 21, 2016. Obama on Monday paid tribute to Cuban national hero Jose Marti before meeting with Cuban President Raul Castro in Havana. (Xinhua/Vladimir Molina/Prensa Latina)
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