See Photos from President Barack Obama's Trip to Cuba

U.S. President Barack Obama, right, and Cuban President Raul Castro wave to fans as they arrive for a baseball game between the Tampa Bay Rays and the Cuban national baseball team in Havana on Tuesday, March 22, 2016.

President Obama and his family watch a baseball game with Cuban President Castro in Havana on March 22.

President Obama and Salvador Valdes Mesa (R) pay tribute to Jose Marti at the Revolution Square in Havana, on March 21, 2016.

Raul Castro, Michelle Obama and President Obama greet before a state dinner at the Palace of the Revolution, in Havana, on March 21, 2016.

Cuban President Raul Castro, right, raises the hand of U.S. President Barack Obama during a joint press conference at the Revolution Palace in Havana on March 21, 2016.

President Barack Obama lays a wreath for Cuban hero Jose Marti at Revolution Square in Havana, on March 21, 2016.

U.S. President Barack Obama and Cuba's President Raul Castro hold their first meeting of Obama's visit to Cuba on March 21, 2016.

President Barack Obama and Cuba's President Raul Castro shake hands during the U.S. President's historic trip to Cuba – the first by a sitting president in 88 years - on March 21, 2016. The meeting, held in Havana, will pave the way for closer economic ties between the two countries, more than 50 years after Cuba's revolution.

President Barack Obama and President Raul Castro review troops before bilateral meetings at the Palace of the Revolution on March 21, 2016 in Havana.

A car passes by a house decorated with the flags of the United States and Cuba in Havana, on March 20 2016.

This photo released by the White House shows President Barack Obama greeting hotel workers in Havana on March 20, 2016.

A Cuban woman poses for a picture with a sign displaying images of Cuban and U.S. Presidents Raul Castro and Barack Obama in Havana on March 19, 2016.

In this photo released by the White House, President Barack Obama, First Lady Michelle Obama, and daughters Malia and Sasha greet dignitaries upon arrival in Havana on March 20, 2016.

In this photo released by the White House, President Barack Obama joins others in looking out the window of Air Force One on final approach into Havana on March 20, 2016.

Cuban citizens wacth as Air Force One lands at Jose Marti Airport in Havana on March 20, 2016.