Which object does NASA plan to design and use to land four astronauts to Mars?

Advanced propulsion equipment :) Advanced propulsion and power systems are critical elements in spacecraft design and play a vital role in determining overall mission capabilities and performance.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

mint more silver currency sorry its probably to late.