Interesting detail in this transcript of the Commander US STRATCOM's statement to the US Senate Armed Services Committee on 13 Feb 20 here - huge developments under way now to modernize the US TRIAD and NC3:
https://www.stratcom.mil/Portals/8/D...SASC_Final.pdf
More official info here:
https://www.energy.gov/nnsa/budget
More press coverage here:
https://www.defensedaily.com/planned...modernization/
https://thediplomat.com/2020/02/will...clear-warhead/