Nuclear Triad

The triad provides survivability through diversity: each leg has different vulnerabilities. ICBMs are accurate but fixed; SLBMs are survivable but harder to recall; bombers are flexible but slow. The US and Russia operate full triads, and China and India field less mature ones. France relies on submarines and aircraft, and the UK only on submarine-launched Trident missiles. ^{[1, 2, 3, 4]}