; and (2) the terms critical infrastructure , EMP , and GMD have the meanings given such terms in section 2 of the Homeland Security Act of 2002 ( 6 U.S.C. 101 ). (b) Homeland security Section 320 of the Homeland Security Act of 2002 ( 6 U.S.C. 195f ) is amended— (1) in the section heading, by inserting and threat assessment, response, and recovery after development ; and (2) by adding at the end the following: (d) Threat assessment, response, and recovery (1) Definitions In this subsection— (A) the term appropriate congressional committees means— (i) the Committee on Homeland Security and Governmental Affairs, the Committee on Armed Services, the Committee on Energy and Natural Resources, and the Committee on Commerce, Science, and Transportation of the Senate; and (ii) the Committee on Homeland Security, the Committee on Armed Services, and the Committee on Energy and Commerce of the House of Representatives; (B) the terms prepare and preparedness mean the actions taken to plan, organize, equip, train, and exercise to build and sustain the capabilities necessary to prevent, protect against, mitigate the effects of, respond to, and recover from those threats that pose the greatest risk to the security of the homeland, including the prediction and notification of impending EMPs and GMDs