President Donald Trump has unveiled the $175 billion “Golden Dome,” a proposed U.S. missile defence system inspired by Israel’s Iron Dome, aiming to neutralise missile threats—including hypersonic weapons—through a space-based shield by 2029.

US President Donald Trump’s Golden Dome missile defence concept revives a controversial, decades-old initiative whose ambitious construction could upend norms in outer space

Importantly, the One, Big, Beautiful Bill includes only an initial $25 billion to begin development of the Golden Dome system. The Trump administration estimates the total cost will be around $175 billion.