What is one sign that Cuba and the USA are willing to normalize relations?

  Relations between Cuba and the United States were formally re-established on 20 July 2015, with the opening of the Cuban embassy in Washington and the U.S. embassy in Havana. Barack Obama visited Cuba for three days in March 2016.

Explanation:

the united states constitution is the supreme law of the united states. the constitution, originally comprising seven articles, delineates the national frame of government. its first three articles embody the doctrine of the separation of powers, whereby the federal government is divided into three branches: the legislative, consisting of the bicameral congress; the executive, consisting of the president; and the judicial, consisting of the supreme court and other federal courts. articles four, five and six embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relationship to the federal government, and the shared process of constitutional amendment. article seven establishes the procedure subsequently used by the thirteen states to ratify it. it is regarded as the oldest written and codified national constitution in force.

uhh idk for sure but i think it makes it difficult to pump the oil through the oil rigs