Trump Golden Dome | What Is Trump's $175 Bn Missile Shield Golden Dome? | US' Iron Dome United States President Donald Trump on Tuesday unveiled new details on his plan for a missile defence system known as "Golden Dome", which is estimated to cost a total of some $175 billion. The "Golden Dome" will be the first weapon the US puts in space, and it should be operational in about three years, by the end of his time in office, the President said. Watch to know more about it.