; and (2) taking into account the results of such assessment, develop a strategy to expedite the hardening of covered military installations and the upgrade of air and missile defense capabilities at such installations to improve defense against such potential attacks. (b) Reports (1) Initial report Not later than 180 days after the date of the enactment of this Act, the Secretary shall submit to the congressional defense committees a report containing the results of the assessment under subsection (a)(1) and the strategy developed under subsection (a)(2). (2) Update Not later than 180 days after the date on which the Secretary submits the report under paragraph (1), the Secretary shall submit to the congressional defense committees a report containing a description of any update made to such assessment or progress made in implementing such strategy. (c) Definitions In this section: (1) The term covered military installation means a military installation located in the area of responsibility of the United States Central Command. (2) The term military installation has the meaning given such term in section 2801 of title 10, United States Code. 352. Semiannual briefings on operational status of amphibious warship fleet (a) In general Not later than 90 days after the date of the enactment of this Act, and on a semiannual basis thereafter until September 30, 2026, the Secretary of the Navy shall provide to the congressional defense committees a briefing on the operational status of the amphibious warship fleet of the Department of the Navy. (b) Elements Each briefing under subsection (a) shall include, with respect to each amphibious warship within such fleet, the following information: (1) The average quarterly operational availability of the amphibious warship. (2) The number of days the amphibious warship was underway during the period covered by the briefing as follows: (A) Training for the purpose of supporting the requirements set forth in the training and readiness manual of the Marine Corps, including unit