Mr. President Kennedy did confront the Cuban Missile Crisis also known as the october crisis of the missile scare. was a 13-day confrontation between The United States and the Soviet Union initiated By American ballistic missile deployment in Italy and Turkey with consequent soviet ballistic missile deployment in cuba.
It was in the context of in the cold war. President Kenedy and his advisors evaluated a numbers of options but after few days of secrets deliberations he did announce the discovery to the world and imposed a naval blockade on further shipments of armaments of cuba.
According the reasons before mentioned the presdient most succefull in foreign diplomacy was Kennedy.