; (ii) barriers to, and benefits of, the introduction of aircraft powered with hydrogen; (iii) the operational differences between aircraft powered with hydrogen and aircraft powered with other types of fuels; (iv) impacts on aircraft emissions; and (v) public, economic, and noise benefits of the operation of aircraft powered with hydrogen and associated aerospace industry activity; and (B) other issues identified by the Secretary of Transportation, the Administrator, the Secretary of Energy, or the advisory committee established under paragraph (6) that must be addressed to enable the safe and expeditious commercial deployment and safe and efficient operation of aircraft powered with hydrogen; and (6) establish an advisory committee composed of representatives of the National Aeronautics and Space Administration, the aerospace industry, aviation suppliers, hydrogen producers, airlines, airport sponsors, fixed base operators, and other stakeholders to advise the Secretary of Transportation, the Administrator, and the Secretary of Energy on the activities carried out under this section and section 3. (c) International leadership The Secretary of Transportation, the Administrator, and the Secretary of Energy, in the appropriate international forums, shall take actions that— (1) demonstrate global leadership in carrying out the activities required by subsections (a) and (b); (2) address the needs of the aerospace industry, aviation suppliers, hydrogen producers, airlines, airport sponsors, fixed base operators, and other stakeholders identified under subsection (b)