Inside the U.S. Army's role in space and missile defense with Lt. Gen. Sean Gainey

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The U.S. Army is tasked with deterring and defending against a myriad of threats from adversaries whose technical prowess has advanced in the 21st Century, perhaps most eye-openingly in the realms of space and hypersonic missile capability. National Security Editor Guy Taylor sits down at with Lt. General Sean Gainey — commanding general of U.S. Army Space and Missile Defense Command, and the Joint Functional Component Command for Integrated Missile Defense — for a wide-ranging discussion on the Army's role as a mission leader and integrator across these futuristic domains.