People holding Argentina's flags celebrate outside the Congress building during Mauricio Macri's swearing-in ceremony as president in Buenos Aires, December 10, 2015.
Martin Acosta / Reuters

For very good reasons, news that U.S. President Barack Obama would make a stop in Cuba on his upcoming tour of Latin America sent diplomatic circles spinning. Calvin Coolidge, who arrived in a battleship in Havana’s harbor in 1928 to attend the Pan-American Conference, was the last American president to visit the island. Obama’s decision to travel to Cuba also shows just how seriously his administration is taking the ongoing rapprochement with Havana that began just last year and that aims to end the 57-year-old freeze in U.S.-Cuban relations triggered by Fidel Castro’s 1959 communist takeover.                  

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