U.S. President Barack Obama arrives to board Air Force One to travel to Cuba from Joint Base Andrews, Maryland March 20, 2016. (Photo by Carlos Barria/Reuters)





Malia Obama walks towards Air Force One upon the arrival of the first family to Andrews Air Force Base, before their departure, Sunday, March 20, 2016, en route to Havana, Cuba. (Photo by Jose Luis Magana/AP Photo)





Air Force One carrying U.S. President Barack Obama and his family flies over a neighborhood of Havana as it approaches the runway to land at Havana's international airport, March 20, 2016. (Photo by Reuters/Stringer)





U.S. President Barack Obama, his wife Michelle, and their daughters Malia and Sasha, exit Air Force One as they arrive at Havana's international airport for a three-day trip, in Havana March 20, 2016. (Photo by Carlos Barria/Reuters)





US President Barack Obama waves next to First Lady Michelle Obama (L) and their daughters Malia (L, behind) and Sasha upon their arrival at Jose Marti international airport in Havana on March 20, 2016. Barack Obama on Sunday became the first US president in 88 years to visit Cuba, touching down in Havana for a landmark trip aimed at ending decades of Cold War animosity. (Photo by Yuri Cortez/AFP Photo)





U.S. President Barack Obama (C) shakes hands with Cuba's foreign minister Bruno Rodriguez as Obama and his family arrived at Havana's international airport for a three-day trip, in Havana March 20, 2016. (Photo by Carlos Barria/Reuters)





U.S. President Barack Obama's daughters Malia (C) and Sasha (R) arrive with their parents at the Jose Marti international airport at the start of a three-day visit to Cuba, in Havana March 20, 2016. (Photo by Carlos Barria/Reuters)





The vehicle carrying President Barack Obama drives along the Malecon sea wall on its way to Old Havana, Cuba, Sunday, March 20, 2016. Obama's trip is a crowning moment in his and Cuban President Raul Castro's ambitious effort to restore normal relations between their countries. (Photo by Desmond Boylan/AP Photo)





Cubans and tourists strain in the rain to get a glimpse of President Barack Obama as his delegation visits Cathedral Square in Old Havana, Cuba, Sunday, March 20, 2016. (Photo by Rebecca Blackwell/AP Photo)





The convoy carrying President Barack Obama and his family drives in the rain along the Malecon sea wall, past an artisan market in Havana, Cuba, Sunday, March 20, 2016. (Photo by Desmond Boylan/AP Photo)





A handful of Cubans gather along the Malecon sea wall under a steady rain to wave to U.S. President Barack Obama's convoy as it arrives in Old Havana, Cuba, Sunday, March 20, 2016. Obama's trip is a crowning moment in his and Cuban President Raul Castro's ambitious effort to restore normal relations between their countries. (Photo by Rebecca Blackwell/AP Photo)





People gather beside the U.S. embassy in Havana as they wait for the arrival of the U.S. President Barack Obama, March 20, 2016. (Photo by Alexandre Meneghini/Reuters)





People gather beside the U.S. embassy in Havana as they wait for the arrival of the U.S. President Barack Obama, March 20, 2016. (Photo by Alexandre Meneghini/Reuters)





U.S. President Barack Obama steps over a puddle while touring Old Havana with his family, in Havana March 20, 2016. (Photo by Carlos Barria/Reuters)





U.S. President Barack Obama, center, walks with first lady Michelle Obama, who is holding the arm of her mother Marian Robinson, during a walking tour of Old Havana, Cuba, Sunday, March 20, 2016. Obama became the first U.S. president to visit the island in nearly 90 years. (Photo by Pablo Martinez Monsivais/AP Photo)





U.S. President Barack Obama steps over a puddle while touring Old Havana with his family, in Havana March 20, 2016. (Photo by Carlos Barria/Reuters)





Members of the White House press corps walk past a woman watching television on her sofa as U.S. President Barack Obama takes a walking tour of in the plaza of the 18th century Catedral de San Cristobal de la Habana in the historic Old Havana neighborhood March 20, 2016 in Havana, Cuba. (Photo by Chip Somodevilla/Getty Images)





People climb a window grate as they get wet in the rain, in hopes of catching a glimpse of President Barack Obama during his visit to Cathedral Square in Old Havana, Cuba, Sunday, March 20, 2016. (Photo by Rebecca Blackwell/AP Photo)





Taking shelter from the pouring rain under umbrellas, U.S. President Barack Obama, his daughter Malia, 17, and members of the first family take a walking tour of in the plaza of the 18th century Catedral de San Cristobal de la Habana in the historic Old Havana neighborhood March 20, 2016 in Havana, Cuba. Obama is the first sitting president to visit Cuba in nearly 90 years. (Photo by Chip Somodevilla/Getty Images)





Members of a Cuban military band prepare for the arrival of U.S. President Barack Obama and Cuban President Raul Castro at the Palace of the Revolution March 21, 2016 in Havana, Cuba. (Photo by Chip Somodevilla/Getty Images)





Honor guards carry the U.S. and Cuban flags as they stand at the bottom of the stairs of the Revolution Palace during a visit by U.S. President Barack Obama in Havana, Cuba March 21, 2016. (Photo by Alexandre Meneghini/Reuters)





President Barack Obama stands with Salvador Valdez Mesa, Vice President of the Council of Ministry, as they take part in a wreath laying ceremony at the Jose Marti memorial in Revolution Square 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. (Photo by Joe Raedle/Getty Images)





Cuban ceremonial troops stand at attention after being reviewed by U.S. President Barack Obama and Cuban President Raul Castro 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 be sitting down for bilateral talks. (Photo by Chip Somodevilla/Getty Images)





U.S. President Barack Obama, second from left, and Secretary of State John Kerry, left, stand as an honor guard marches during a ceremony to lay a wreath at the Jose Marti monument in Revolution Square in Havana, Cuba, Monday March 21, 2016. Center left is Salvador Valdes Mesa Vice-President of Cuba's State Council. “It is a great honor to pay tribute to Jose Marti, who gave his life for independence of his homeland. His passion for liberty, freedom, and self-determination lives on in the Cuban people today”, Obama wrote in dark ink in the book after he laid a wreath and toured a memorial dedicated to the memory of Jose Marti. (Photo by Enric Marti/AP Photo)





A military unit arrives to participate in a welcoming ceremony as Cuban President Raul Castro welcomes U.S. President Barack Obama at the Palacio de la Revolucion in Havana March 21, 2016. (Photo by Jonathan Ernst/Reuters)





A military band prepares to play the national anthems before Cuban President Raul Castro welcomes U.S. President Barack Obama at the Palacio de la Revolucion in Havana March 21, 2016. (Photo by Jonathan Ernst/Reuters)





A military band prepares to play the national anthems before Cuban President Raul Castro welcomes U.S. President Barack Obama at the Palacio de la Revolucion in Havana March 21, 2016. (Photo by Jonathan Ernst/Reuters)





US President Barack Obama (R) is received by President of Cuba Raul Castro (L) at the Palace of the Revolution in Havana, Cuba, 21 March 2016. US President Barack Obama is on an official visit to Cuba from 20 to 22 March 2016; the first US president to visit since Calvin Coolidge 88 years ago. (Photo by Alejandro Ernesto/EPA)





Cuban President Raul Castro (2nd L) and U.S. President Barack Obama (R) review Cuban soldiers during a welcome ceremony for Obama at the “Palacio de la Revolucion” in Havana, March 21, 2016. (Photo by Jonathan Ernst/Reuters)





The limousine of U.S. President Barack Obama is seen at the Jose Marti memorial in the Plaza de la Revolucion, during a welcome ceremony as part of President Obama's three-day visit to Cuba, in Havana March 21, 2016. (Photo by Carlos Barria/Reuters)





Cubans line the road to see the motorcade of U.S. President Barack Obama as he is driven to the first meeting with Cuban's President Raul Castro on the second day of Obama's visit to Cuba, in Havana March 21, 2016. (Photo by Carlos Barria/Reuters)





U.S. President Barack Obama smiles at reporters as he takes part in a walking tour including the Museum of the City of Havana, in Havana, Cuba March 20, 2016. Also pictured is Obama's daughter Sasha Obama (R). (Photo by Jonathan Ernst/Reuters)





First lady Michelle Obama, right, looks over to Cuban President Raul Castro, center, as she and her husband President Barack Obama, left, attend a State Dinner hosted by Cuban president at the Palace of the Revolution, Monday, March 21, 2016, in Havana, Cuba. (Photo by Pablo Martinez Monsivais/AP Photo)





US President Barack Obama (R), First Lady Michelle Obama (C) and US Charge d'Affaires in Cuba Jeffrey DeLaurentis meet with US embassy staff in Havana on March 20, 2016. Obama arrived in Cuba to bury the hatchet in a more than half-century-long Cold War conflict that turned the communist island and its giant neighbor into bitter enemies. (Photo by Nicholas Kamm/AFP Photo)





U.S. President Barack Obama, left, attends a State Dinner hosted by Cuban President Raul Castro, right, at the Palace of the Revolution, Monday, March 21, 2016, in Havana, Cuba. (Photo by Pablo Martinez Monsivais/AP Photo)