How the U.S. nuclear triad forms America’s ultimate deterrence system

The U.S. is upgrading its Cold War-era nuclear triad to preserve credible deterrence against Russia and China.

The land-based leg is moving from Minuteman III to the Sentinel program to keep a survivable ICBM force.

At sea, Ohio-class submarines and Trident II D5 missiles are being replaced by the Columbia-class to sustain second-strike capability.

In the air, B-52s and B-2s are being modernized while the B-21 Raider and LRSO missile expand flexible strike options.

These upgrades, along with NC3 improvements, aim to keep the triad resilient in a two-peer nuclear environment.