Our government is announcing on the launched missile from North Korea today. As if they got ready for any attacks by BM with Aegis system as well as PAC3. But BM defense system could deal with only dozens of missiles at a time. In real nuclear war, there will be hundreds of nuclear bomb installed BMs or a few among hundreds of regular bomb installed BMs directed to our country. It is impossible to defend against such BM attack.
They are now extending the system toward the space. It will destroy the communication system of a certain country if they could nullify the satellites with such as nuclear bomb in the space. The threshold to use nuclear bombs in the space is told lower than that on the ground since the former won't cause immediate contamination on the ground. It might cost astronomical amount of budget to develop BM defense system. They have already started developing the system in the space.
BM system won't work in reality. BMD is only for the military industry but not for the people. There will be only endless competition to develop the system superior to the enemies. Since it is endless, it will be a real burden to the national finance.
BMD is a thing which belongs to evil.