History -- National security -- 2 20th century. -- 1 21st century. -- 1 Arms control 1 Arms race -- 1 Atomic bomb -- 1 more ... Executive power -- 1 Foreign relations -- 1 History. -- 1 Military readiness 1 Natinal security -- 1 National security 1 Operation Allied Force, 1999 1 Political aspects -- 1 Politics and government -- 1 less ...