United States Secretary of Defense to die was Frank Carlucci (1987–1989), on 3 June 2018. United States Secretary of Defense The Secretary of Defense (SecDef) is the leader and chief executive officer of the United States Department of Defense, the executive department of the Armed Forces of the United States. The Secretary of Defense's position of command and authority over the United States' military is second only to that of the President and Congress, respectively. This position corresponds to what is generally known as a Defense Minister in many other countries. The Secretary of Defense is appointed by the President with the advice and consent
Assistant Secretary of Defense for Nuclear, Chemical & Biological Defense Programs US Energy Research and Development Administration and the US Department of Energy) on all matters relating to military applications of atomic weapons or atomic energy. It addressed matters of policy, programming, and funding of the military application of atomic energy. The National Defense Authorization Act for Fiscal Year 1987 (P.L. 99-661, passed in November 1986) abolished the Military Liaison Committee, replacing it with the Nuclear Weapons Council. Just over a year later, the National Defense Authorization Act for Fiscal Years 1988-1989 (P.L. 100-180) created the position of Assistant to the Secretary of Defense (Atomic Energy). In 1994, the Assistant to