Cuban Missile Crisis forces. Kennedy met with members of EXCOMM and other top advisers throughout October 21, considering two remaining options: an air strike primarily against the Cuban missile bases or a naval blockade of Cuba. A full-scale invasion was not the administration's first option. McNamara supported the naval blockade as a strong but limited military action that left the US in control. The term "blockade" was problematic. According to international law, a blockade is an act of war, but the Kennedy administration did not think that the Soviets would be provoked to attack by a mere blockade. Additionally, legal experts at the
Cuban Missile Crisis Jupiter missiles as obsolescent and already supplanted by the Polaris nuclear ballistic submarine missiles. On the morning of October 27, a U-2F (the third CIA U-2A, modified for air-to-air refueling) piloted by USAF Major Rudolf Anderson, departed its forward operating location at McCoy AFB, Florida. At approximately 12:00 pm EDT, the aircraft was struck by a S-75 Dvina (NATO designation "SA-2 Guideline") surface-to-air missile launched from Cuba. The aircraft was shot down, and Anderson was killed. The stress in negotiations between the Soviets and the US intensified; it was only later believed that the decision to fire the missile was