; (3) leverage United States commercial and military cybersecurity technology and services to harden and defend such networks, infrastructure, and systems; and (4) conduct combined cybersecurity training activities and exercises. (c) Briefings (1) Requirement Not later than 180 days after the date of the enactment of this Act, the Secretary of Defense, in coordination with the Secretary of State, shall provide to the appropriate congressional committees a briefing on the implementation of this section. (2) Contents The briefing under paragraph (1) shall include the following: (A) A description of the feasibility and advisability of expanding cooperation on military cybersecurity activities between the Department of Defense and the Government of Taiwan. (B) An identification of any challenges and resources necessary to be addressed so as to expand such cooperation. (C) An overview of efforts undertaken pursuant to this section. (D) Any other matters the Secretary determines relevant. (d) Appropriate congressional committees defined In this section, the term appropriate congressional committees means— (1) the Committee on Armed Services and the Committee on Foreign Affairs of the House of Representatives; and (2) the Committee on Armed Services and the Committee on Foreign Relations of the Senate.