; (2) the Secretary of Defense requires timely, insightful, and unbiased analysis on cost estimation for major defense acquisition programs; and (3) the Office of the Director of Cost Assessment and Program Evaluation supports implementation of the National Defense Strategy by— (A) providing insight into the costs of major defense acquisition programs and other technology development initiatives that enables responsible budgeting and proactive management decisions so that the Department can control cost, drive efficiency, and achieve savings; (B) ensuring that the cost estimation workforce of the Department of Defense is using the most modern and realistic cost estimation methodologies, tools, and tradecraft, including the collection and distribution of data through the Cost Assessment Data Enterprise; and (C) providing timely review and oversight of cost estimates performed by the defense agencies and military departments. 808. Emergency acquisition authority for purposes of replenishing United States stockpiles Section 3601(a)(1) of title 10, United States Code, is amended— (1) in subparagraph (A)(iv), by striking ; or and inserting a semicolon; (2) in subparagraph (B), by striking the period at the end and inserting ; or ; and (3) by adding at the end the following new subparagraph: (C) for purposes of— (i) replenishing United States stockpiles with like defense articles when those stockpiles are diminished as a result of the United States providing defense articles in response to an armed attack by a country of concern (as that term is defined in section 1(m) of the State Department Basic Authorities Act of 1956 ( 22 U.S.C. 2651a(m) ) against— (I) a United States ally (as that term is defined in section 201(d) of the Act of December 2, 1942, entitled, To provide benefits for the injury, disability, death, or enemy detention of employees of contractors with the United States, and for other purposes (56 Stat. 1028, chapter 668; 42 U.S.C. 1711(d) )); or (II) a United States partner