Today, the world is attempting to control nuclear proliferation through
diplomacy and treaties. In 1996, the Comprehensive Test Ban Treaty prohibited
nations from using bombs for either military or research purposes. Forty-one
states with nuclear capabilities have signed the treaty, but it cannot take
effect until three more nations join. India, Pakistan, and North Korea are among
the countries that have refused. Although the United States has signed the
treaty, it has not ratified it yet.