will soon finish the expansion to 44 ground-based interceptors and begin the construction of a new S-band radar, the Long Range Discrimination Radar (LRDR), at Clear Air Force Station, Alaska, starting in 2018. (22) The Missile Defense Agency is currently researching, testing, and developing the Configuration-3 (C3) booster, a selectable two- or three-stage booster, and has plans to field this capability by September 30, 2023. (23) Section 1682 of the National Defense Authorization Act for Fiscal Year 2016 ( Public Law 114–92