Golden Dome: Everything to know about Trump's $25 billion missile defense plan
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By Iain Boyd published May 26, 2025
President Trump has set aggressive goals for Golden Dome, but many parts of the system already exist.
President Donald Trump announced a plan to build a missile defense system, called the Golden Dome, on May 20, 2025. The system is intended to protect the United States from ballistic, cruise and hypersonic missiles, and missiles launched from space.
Trump is calling for the current budget to allocate US$25 billion to launch the initiative, which the government projected will cost $175 billion. He said Golden Dome will be fully operational before the end of his term in three years and will provide close to 100% protection.
The Conversation U.S. asked Iain Boyd, an aerospace engineer and director of the Center for National Security Initiatives at the University of Colorado Boulder, about the Golden Dome plan and the feasibility of Trump's claims. Boyd receives funding for research unrelated to Golden Dome from defense contractor Lockheed Martin.
Why does the United States need a missile shield?
Several countries, including China, Russia, North Korea and Iran, have been developing missiles over the past few years that challenge the United States' current missile defense systems.
These weapons include updated ballistic missiles and cruise missiles, and new hypersonic missiles. They have been specifically developed to counter America's highly advanced missile defense systems such as the Patriot and the National Advanced Surface-to-Air Missile System.
For example, the new hypersonic missiles are very high speed, operate in a region of the atmosphere where nothing else flies and are maneuverable. All of these aspects combined create a new challenge that requires a new, updated defensive approach.
https://www.livescience.com/technology/engineering/golden-dome-an-aerospace-engineer-explains-the-proposed-nationwide-missile-defense-system
