The Cuban missile crisis was the most nerve racking time between the U.S. and the Soviet Union. In October 1962 the Soviet Union secretly transported nuclear war heads into Cuba. The U.S. soon found out when U-2 planes flew over Cuba and took photos of the missiles which were sent to President Kennedy. President Kennedy soon put the country on alert and sent a military force to quarantine the area but not invade the country, and Kennedy demanded if a soviet ship was going into Cuba it was to be sent back. Kennedy also stated that the Russians must take apart all nuclear missiles and return to Russia. On October 28, 1962 Russia and the U.S. reached an agreement that Russia would remove the nuclear missile from Cuba and that the U.S. would never invade Cuba again. There was a also an unwritten part of the agreement saying that the U.S. would remove its missiles from turkey and shortly later the missiles were removed from turkey.