20thcentury aerial aeronautics airplanes airpower airwarfare ballisticmissiledefenses bombers bombing centralintelligenceagency coldwar commandandcontrolsystems congresses defenses deterrence(strategy) firststrike(nuclearstrategy) governmentpolicy greatbritain history intelligenceservice intercontinentalballisticmissiles international jetfighterplanes middleeast middlepowers military militarypolicy militaryrelations nucleararmscontrol nuclearcrisisstability nuclearnonproliferation nuclearwarfare nuclearweapons philosophy pictorialworks polaris(missile) russia(federation) security southasia sovietunion strategicbombers strategicweaponssystems strategy unitedstates weaponssystems worldpolitics