 After relations between the United States and Cuba deteriorated following Fidel Castro's rise to power in Cuba in 1959, it disappeared from public view.It may have been stolen by "xenophobic vandals .. during the 1962 Cuban Missile Crisis", or it may have been removed for a construction project.According to the National Park Service, the urn was placed in a West Potomac Park rose garden in 1928, as directed by Congress, near the future location of the Jefferson Memorial, where it remained until the 1940s, when it was moved for the 14th Street Bridge.