The U.S. announced in December 2014 that, after decades of isolation, it has begun taking major steps to normalize relations with Cuba, its neighbor to the south. The announcement marks a dramatic shift away from a policy that has its roots in one of the darkest moments of the Cold War — the Cuban missile crisis. Although the U.S. trade embargo is unlikely to end any time soon, American and Cuban leaders today are trying to bring a relationship once defined by a crisis in the 1960s into the 21st century.