HAVANA, CUBA - MARCH 21: U.S. President Barack Obama (R) and Cuban President Raul Castro greet one another before bilateral meetings at the Palace of the Revolution March 21, 2016 in Havana, Cuba. These are the first direct talks between Castro and Obama, the first sitting U.S. president to visit Cuba in 88 years. (Photo by Chip Somodevilla/Getty Images)
