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 made locally by an undetermined Soviet commander, acting on his own authority. Later that day, at about 3:41 pm EDT, several US Navy RF-8A Crusader aircraft, on low-level photoreconnaissance missions, were fired upon. On October 28, 1962, Khrushchev told his son Sergei that the shooting down of Anderson's U-2 was by the "Cuban military at the direction of Raul Castro." At 4:00 pm EDT, Kennedy recalled members of EXCOMM to the White House and ordered that a message should immediately be sent to U Thant asking the Soviets to suspend work on the missiles while negotiations were carried out. During