defense capacity by 28 ground-based interceptors (a) Findings Congress makes the following findings: (1) A report from Johns Hopkins University, published in 2015, and entitled North Korea’s Nuclear Futures: Technology and Strategy , concluded that, by 2020, North Korea could have as many as 100 nuclear weapons. (2) By December 31, 2017, the United States will have 44 operational ground-based interceptors distributed between Fort Greely, Alaska, and Vandenberg Air Force Base, California. (3) Missile Field 1 and Missile Field 2 at Fort Greely have the capacity to house an additional 14 and 6 ground-based interceptors, respectively, without the added infrastructure costs of some common ground systems. (4) A report by the Department of Defense, submitted to Congress in 2013, and entitled Homeland Defense Hedging Policy and Strategy , recommended acquiring 14 operational and testing spares for increased testing requirements and to support increased capacity as a hedge against emerging threats. (b) Increase in capacity The Secretary of Defense shall, subject to the annual authorization of appropriations and the annual appropriation of funds for National Missile Defense, increase the number of United States ground-based interceptors by 28. (c) Report to Congress (1) In general Not later than 90 days after the date of the enactment of this Act, the Director of the Missile Defense Agency shall submit to the congressional defense committees (as defined in section 101(a) of title 10, United States Code) a report on infrastructure requirements to increase the number of ground-based interceptors at Missile Field 1 and Missile Field 2 at Fort Greely to 20 ground-based interceptors each. (2) Contents The report required by paragraph (1) shall include the following: (A) An analysis of the strategic, operational, and tactical benefits of adding additional ground-based interceptors at each missile field. (B) A detailed description of the infrastructure needed and costs associated with expanding each missile field. (C) An