Soviet deployment had depended on a major nuclear build-up taking place without the USA realising it had happened
Secrecy ended on 14 October when a U-2 spy plane flight produced unmistakable evidence of an R-12 missile site at San Cristobal
16 Oct – JFK’s Nation Security Adviser, McGeorge Bundy, informed him of the presence of Soviet nuclear missiles on Cuba
JFK immediately assembled an advisory committee known as ExComm or the Executive Committee of the National Security Council
The group’s main role was to consider policy options and their consequences
Members: JFK, Secretary of State, Dean Rusk, Defence Secretary, Robert McNamara, Attorney General, Robert Kennedy, and the Chairman of the Joint Chiefs of Staff, General Maxwell Taylor
ExComm consisted of ‘hawks’ who called for US military actions and ‘doves’ who favoured diplomacy
The real issue was: how could the missiles be removed?
The USA could do nothing which might risk splitting the NATO alliance, by appearing to ignore the interests of Europe in favour of a purely American policy
Anything that remotely exposed Europe to a Soviet nuclear response would be unacceptable to both Europe and the USA
Increasing detail from U-2 spy plane photos meant it became clear that any kind of air strike against the installation was unfeasible
As the scope of any potential air strike widened, the likelihood that a military response would be undertaken narrowed
JFK opted for a naval blockade that would stem the flow of missiles entering Cuba
There were simply too many missiles to guarantee the destruction of all of them before any Soviet retaliatory action against the USA
After initially supporting a ‘no warning’ attack, JFK agreed to support McNamara’s idea of a blockade on offensive weapon shipments to Cuba
US bases were put on maximum alert in prep for a possible military strike against Cuba
JFK had not lost sight of the possibility of a Soviet attack against West Berlin
Next day – UN Security Council met
The US ambassador to the UN, Adlai Stevenson, condemned the Soviet deployment and referred to Cuba as ‘an accomplice in the communist enterprise of world domination’
Neither the Soviet ambassador to the UN, Valerian Zorin, nor the ambassador to the USA, Anatoly Dobrynin, had been told of the deployment by Moscow
NK called the blockade ‘an act of aggression…pushing mankind toward the abyss of a world nuclear-missile war’
By 24 October – the first Soviet ships to reach the quarantine either stopped dead in the water or turned around