https://missilethreat.csis.org/system/thaad/
https://en.wikipedia.org/wiki/Hwasong-15
https://www.bloomberg.com/graphics/2017-us-defense-against-north-korean-nuclear-attack/.
https://www.defensenews.com/battlefield-tech/space/2020/09/15/space-forms-confirms-space-based-infrared-system-detected-missile-attack-in-january/
https://en.wikipedia.org/wiki/Space_Tracking_and_Surveillance_System
https://en.wikipedia.org/wiki/Hwasong-14
https://www.businessinsider.com/north-korean-nuclear-strike-united-states-arrival-times-2017-8
https://en.wikipedia.org/wiki/RIM-161_Standard_Missile_3
https://www.mda.mil/system/gmd.html