S. H. Simon Oxford Solid State Basics Oxford 2013 (p. 114) [3] S. Hunklinger FestkÃ¶rperphysik De Gruyter 2014 (p. 55) [4] R. Gross, A. Marx FestkÃ¶rperphysik De Gruyter 2014 (ch. 1.1.1.2) [5] S. Hunklinger FestkÃ¶rperphysik De Gruyter 2014 (p. 56) [6]
The current secretary of defense is Robert Gates. The role of the Secretary of Defense is to be the principal defense policy advisor to the President and is responsible for thâ¦e formulation of general defense policy related to all matters of direct and primary concern to the Department of Defense, and for the execution of approved policy.
The Secretary of State, and by extension, the Chief of Mission (COM), are responsible for developing and implementing security policies and programs that provide for the protection of all U.S. Government personnel (including accompanying dependents) on official duty abroad. This mission is executed through the Bureau of Diplomatic Security (DS).