What term describes the triad of delivery systems (ICBMs, SLBMs, strategic bombers) that supports U.S. nuclear deterrence?

• A. The nuclear triad
• B. The strategic triangle
• C. The missile shield
• D. The deterrence triad

Answer: (A)

The concept being tested is the nuclear triad—the three delivery systems that make U.S. nuclear deterrence credible. Intercontinental ballistic missiles, submarine-launched ballistic missiles, and strategic bombers form this triad, each with unique strengths that together ensure a reliable second-strike capability. ICBMs provide a prompt, land-based leg that can quickly respond to an attack; submarine-launched missiles offer stealth and survivability because ballistic-missile submarines are hard to detect and can remain hidden at sea; strategic bombers add flexibility, the ability to be recalled, and, if needed, the option to deliver conventional or nuclear payloads. Together they deter by ensuring that no first strike can disarm the United States, since at least one leg would remain able to retaliate. This labels—the nuclear triad—are the standard historical and doctrinal term for this arrangement, whereas the other options describe different concepts (defensive missile shields, generic “strategic triangle,” or nonstandard phrasing) and do not capture the three-delivery-system framework.