The conversation between human and AI assistant.
Can the us be invaded?
Are there any other systems in place to protect the US?
Yes, the Aegis Ballistic Missile Defense System is another missile defense system used by the United States. It is a sea-based system that uses radar and interceptors to detect and destroy incoming ballistic missiles. The system is primarily used to protect ships and naval assets, but can also be used to defend against land-based threats.