With the recent tests by India and Pakistan, many observers believe that the world's greatest potential for nuclear conflict now lies in South Asia.

washingtonpost.com staff

NPT-Declared Nuclear States*: United States Britain France Russia China Self-Declared Nuclear States: India Pakistan Undeclared Nuclear States: Israel High-Risk States: Iran Iraq Libya North Korea

Source: Carnegie Endowment for International Peace

*Note: Despite the recent tests by both India and Pakistan, the two countries are not technically recognized as "declared nuclear powers" under the 1968 Nuclear Non-Proliferation Treaty (NPT), hence the designation as "self-declared" powers. "Declared nuclear powers" are those who have agreed to the terms and obligations of the treaty.