According to the GAO, “…in 2014, the Secretary of Defense directed two reviews of DOD's nuclear enterprise. The reviews made recommendations to address long-standing issues with leadership, investment, morale, policy, and procedures, as well as other shortcomings adversely affecting the nuclear deterrence mission. In 2015, DOD conducted a review focused on nuclear command, control, and communications systems, resulting in additional recommendations. The National Defense Authorization Act for Fiscal Year 2017 included a provision for GAO to review DOD's processes for addressing these recommendations. GAO assessed the extent to which DOD has (1) made progress implementing the recommendations; (2) evaluated the metrics and milestones for implementing the 2014 nuclear enterprise review recommendations related to nuclear security forces; and (3) implemented oversight mechanisms, including developing an approach for monitoring long-standing issues. GAO reviewed documents and interviewed DOD officials on the recommendations' status and DOD's oversight. GAO is making four recommendations for DOD to provide guidance to require its components to assess implementation metrics and milestones; and document roles, responsibilities, and communication methods for the new oversight group, as well as a means to monitor long-standing nuclear enterprise issues. DOD concurred with all of the recommendations.”