Executive power -- 4 20th century. -- 1 21st century. -- 1 Atomic bomb -- 1 Cabinet officers -- 1 Cabinet system -- 1 Case studies. -- 1 more ... Executive departments -- 1 History -- 1 History. -- 1 Management. -- 1 Natinal security -- 1 National security -- 1 Political aspects -- 1 Politics and government 1 Politics and government -- 1 Presidents -- 1 less ...