The following is the May 6, 2021 Government Accountability Office report, Nuclear Triad: DoD and DoE Face Challenges Mitigating Risks to U.S. Deterrence Efforts.
From the report
What GAO Found
The Department of Defense (DOD) plans to replace or modernize existing triad platforms including submarines, intercontinental ballistic missiles, and bomber aircraft, as well as many of the nuclear command, control, and communication systems that facilitate control of them (see below). The Department of...
https://news.usni.org/2021/05/07/gao-report-on-u-s-nuclear-triad