A US presidential visit to Cuba was unthinkable 15 months ago.
It has been almost 90 years since the last visit by President Calvin Coolidge.
A US embargo has crippled the Cuban economy for more than fifty years.
But when President Barack Obama announced a thaw in their frozen relations at the end of 2014, he began a process of engagement he hopes will outlive his time in the White House.
Obama's historic visit to Havana is being seen as a way of cementing his diplomatic legacy.
So, who stands to gain from the new chapter in their troubled relationship?
Presenter: Folly Bah Thibault
Kevin Casas-Zamora - Director of the Inter-American Dialogue’s Rule of Law Programme
Rachel DeLevie-Orey - Assistant Director with the Atlantic Council’s Latin America Center
Source: Al Jazeera