Obama lands in Cuba as first US president to visit in nearly a century (theguardian.com)
"'This is a historic visit," Obama said as he greeted US Embassy staff and their families at a Havana hotel. "It's an historic opportunity to engage with the Cuban people.'"
Cuba Sanctions: Legislative Restrictions Limiting the Normalization of Relations (fas.org)
"Since the early 1960s, U.S. policy toward Cuba has consisted largely of isolating the island nation through comprehensive economic sanctions, including an embargo on trade and financial transactions."
The Cuban Missile Crisis (history.state.gov)
"The Cuban Missile Crisis of October 1962 was a direct and dangerous confrontation between the United States and the Soviet Union during the Cold War and was the moment when the two superpowers came closest to nuclear conflict."