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 the United Nations, to ensure the carrying out and continuation of these commitments (a) to remove promptly the quarantine measures now in effect and (b) to give assurances against the invasion of Cuba." The letter was also released directly to the press to ensure it could not be "delayed." With the letter delivered, a deal was on the table. As Robert Kennedy noted, there was little expectation it would be accepted. At 9:00 pm EDT, the EXCOMM met again to review the actions for the following day. Plans were drawn up for air strikes on the missile sites as well