US President John Fitzgerald Kennedy signs the order of naval blockade of Cuba, on October 24, 1962 in White House, Washington DC, during the Cuban missiles crisis. On October 22, 1962, President Kennedy informed the American people of the presence of missile sites in Cuba. Tensions mounted, and the world wondered if there could be a peaceful resolution to the crisis, until November 20, 1962, when Russian bombers left Cuba, and Kennedy lifted the naval blockade. (Photo credit should read /AFP/Getty Images)