The genesis of 'Directed Energy Weapon' (DEWs) came up during cold war when Karl Bendetson and the High Frontier panel of private citizens advised President Ronald Reagan for a crash program to develop missile defenses. It was not just to defend against Soviet nuclear weapons but also because of strong indications that the Soviets were going to deploy 'powerful directed energy weapons' in space to gain control of space by using weapons like lasers, jammers etc. Towards the end of Cold War, the US focused on ballistic missile defence and spending on DEWs.