D onald Trump is moving forward with an ambitious and expensive national missile defense system, saying Tuesday that he aims to get it up and running before the end of his term. Alongside Defense Secretary Pete Hegseth and Space Force Vice Chief of Operations Gen. Michael Guetlein, the President announced the so-called “Golden Dome”—a defense system of missiles, satellites, and sensors named after his favorite color and akin to Israel’s “Iron Dome,” which the U.S. has in large part funded.