The Department of Defense is already on a path to acquire a new interceptor for the Ground-Based Midcourse Defense (GMD) system, which is the only system designed to defend the United States against a limited intermediate-range and intercontinental ballistic missile (ICBM) attack from North Korea and Iran. Yet, there are questions about the extent to which the United States should rely on the GMD system given the changing threat, the system's troubled development and expense, and the need to fund new programs such as those focused on new hypersonic threats and tracking missiles from space.
展开▼