 Reports establish that these have since been removed but it has never confirmed by any independent 3rd party organization such as IAEA.The U.S. still maintains "the continuation of the extended deterrent offered by the U.S. nuclear umbrella".In September 1956, the U.S. Chairman of the Joint Chiefs of Staff Admiral Radford told the U.S. Department of State that the U.S. military intention was to introduce atomic weapons into South Korea.