On the occasion of President Barack Obama´s upcoming historic visit to Cuba, followed by a two-day visit to Argentina, Amnesty International would like to take this opportunity to highlight to the three Presidents a number of major human rights concerns which we hope will be prioritized as part of your discussions. USA: Detentions at Guantánamo Bay; The US economic embargo on Cuba; Migrants and refugees. Cuba: International scrutiny; Arbitrary arrests and restrictions on freedom of expression, association and assembly. Argentina: Access to justice and the end to impunity; Rights of Indigenous Peoples; Freedom of expression and right to peaceful assembly.