A Cuban military color guard carrying a Cuban flag and an American flag watch as U.S. President Barack Obama passes them on they way into Palacio de la Revolucion to meet Cuban President Raul Castro on March 21, 2016 in Havana, Cuba. Mr. Obama’s visit is the first in nearly 90 years for a sitting president, the last one being Calvin Coolidge.
(March 20, 2016 – Source: Joe Raedle/Getty Images South America