The Office of the Assistant Secretary of Defense for Global Strategic Affairs (ASD/GSA) is a newly configured directorate in the Office of the Secretary of Defense that develops policy for the Secretary on countering weapons of mass destruction, nuclear forces and missile defense, cyber security and space issues. GSA is currently tasked with three major congressionally-mandated reviews: the Nuclear Posture Review, the Ballistic Missile Defense Review, and the Space Posture Review. In addition, GSA is the Defense Department's lead in developing a cybersecurity strategy for the Department and for crafting the policy for the standup of the new Cyber Command.