Kennedy prevented completion of missile bases in Cuba by approving a naval blockade. This in turn stopped supplies from making it to Cuba.
In Cuba.
missile bases
President Kennedy prevented completion of missile bases in Cuba by approving a military blockade of Cuba to check all ships for offensive weapons bound for Cuba (and turn away any that were carrying such).
The Cuban missile crisis came to and end because Kennedy and Khrushchev made an agreement. In the agreement it stated that if Kennedy were to remove its naval blockade around Cuba and if it removes its missile bases in Turkey, Khrushchev would remove his missile bases from Cuba.
The USSR (popularly known as Russia) was supplying the missile bases in Cuba.
kennedy
Kennedyapproved a naval blockade, to stop the flow of supplies toCuba
The Soviet Union had begun to install nuclear weapons in Cuba.
President Kennedy set up a naval blockade to turn back Soviet ships that were carrying missiles to Cuba. The US promised not to invade Cuba and to remove nuclear missiles from Turkey and Europe in exchange for the dismantling of missile bases in Cuba. The US claimed, that it had already planned the Turkey missile bases.
In 1962, the world learned that there was a build up of medium range missiles and missile bases in Cuba. U2 spy planes actually photographed the missiles and the bases.
US & USSR.