In October 1962, an American spy plane U-2 photographed the nuclear missile sites secretly being built in Cuba by the Soviet Union. After consulting with his advisors, President Kennedy ordered a naval blockade around Cuba to prevent further military shipments. While making a televised address to the nation about the crisis, he demanded destruction of the missile sites. The world watched tensely for two weeks the grave stand-off between the two superpowers with the imminent outbreak of a nuclear war. The crisis was finally averted by both the sides agreeing to remove their respective nuclear missiles from Cuba and Turkey.