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In scenes that would have seemed far-fetched just a few years ago, American flags were flying in Cuba on Sunday as the nation awaited President Obama's historic visit.

Not since Calvin Coolidge has a sitting U.S. president set foot on Cuban soil. Obama and Cuban leader Raul Castro have been moving aggressively to normalize relations since 2014, when they announced that their two countries would be restoring the diplomatic ties that had been severed since the heights of the Cold War.

Obama, along with his family, will be in Cuba until Tuesday. Among other events, they will attend an official state dinner, and Obama will deliver a speech to the Cuban people.

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Below, see some pictures of Havana as it prepared for Obama's arrival.

HAVANA, CUBA - MARCH 20: United States and Cuban flags fly side-by-side on the roof of the Iberostar Hotel Parque Central near El Capitolio (background) in the historic Old Havana neighborhood March 20, 2016 in Havana, Cuba. President Barack Obama is scheduled to arrive in Cuba Sunday afternoon, the first time a sitting U.S. president has visited the island nation in nearly 90 years. (Photo by Chip Somodevilla/Getty Images)
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HAVANA, CUBA - MARCH 18: A sign with a picture of Cuban President Raul Castro and U.S. President Barack Obama is seen on a wall in Old Havana as Cuba prepares for the visit of U.S. president Barack Obama on March 18, 2016 in Havana, Cuba. Obama's visit March 20-22 will be the first in 90 years for a sitting American president. (Photo by Joe Raedle/Getty Images)
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HAVANA, CUBA - MARCH 19: An air freshener in the colors of the American flag sits above a Cuban flag in a taxi as Cuba prepares for the visit of U.S. president Barack Obama on March 19, 2016 in Havana, Cuba. Mr. Obama's visit on March 20 - 22 will be the first in 90 years for a sitting American president. (Photo by Joe Raedle/Getty Images)
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HAVANA, CUBA - MARCH 18: People exercise in the morning as Cuba prepares for the visit of U.S. president Barack Obama on March 18, 2016 in Havana, Cuba. Mr. Obama's visit on March 20 - 22 will be the first in 90 years for a sitting American president. (Photo by Joe Raedle/Getty Images)
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HAVANA, CUBA - MARCH 20: Light clouds hang over the historic Old Havana neighborhood March 20, 2016 in Havana, Cuba. President Barack Obama is scheduled to arrive in Cuba Sunday afternoon, the first time a sitting U.S. president has visited the island nation in nearly 90 years. (Photo by Chip Somodevilla/Getty Images)
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HAVANA, CUBA - MARCH 19: A painting of Ernesto "Che" Guevara, a hero of the Cuban revolution is seen on a wall as Cuba prepares for the visit of U.S. president Barack Obama on March 19, 2016 in Havana, Cuba. Mr. Obama's visit on March 20 - 22 will be the first in 90 years for a sitting American president. (Photo by Joe Raedle/Getty Images)
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HAVANA, CUBA - MARCH 18: Vehicles are seen driving along the Malecon as Cuba prepares for the visit of U.S. president Barack Obama on March 18, 2016 in Havana, Cuba. Mr. Obama's visit on March 20 - 22 will be the first in 90 years for a sitting American president. (Photo by Joe Raedle/Getty Images)
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HAVANA, CUBA - MARCH 18: A fisherman is seen along the Malecon as Cuba prepares for the visit of U.S. president Barack Obama on March 18, 2016 in Havana, Cuba. Mr. Obama's visit on March 20 - 22 will be the first in 90 years for a sitting American president. (Photo by Joe Raedle/Getty Images)
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