HAVANA, CUBA - MARCH 21: Cuban Vice President Miguel Mario Diaz-Canel arrives for talks with U.S. President Barack Obama at the Palace of the Revolution March 21, 2016 in Havana, Cuba. The first sitting U.S. president to visit Cuba in 88 years, Obama and Castro will sit down for bilateral talks and will deliver joint statements to the news media. (Photo by Chip Somodevilla/Getty Images)