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 the Secretary of Defense (Atomic Energy) was given control over the Defense Nuclear Agency (DNA), which became the Defense Threat Reduction Agency. In February 1996, the National Defense Authorization Act for Fiscal Year 1996 (P.L. 104-106) officially created the office of the Assistant to the Secretary of Defense for Nuclear & Chemical & Biological Defense Programs, or ASTD (NCB) to replace that of the Assistant to the Secretary of Defense (Atomic Energy). The Clinton administration declined to nominate an Assistant to the Secretary of Defense for Nuclear & Chemical & Biological Defense Programs between 1997 and 2001, having determined (as