GOLDEN DOMEGolden Dome: An Aerospace Engineer Explains the Proposed Nationwide Missile Defense System
Similar to Iron Dome, Golden Dome will consist of sensors and interceptor missiles but will be deployed over a much wider geographical region and for defense against a broader variety of threats in comparison with Iron Dome.
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.
Russia has fired hypersonic missiles against Ukraine in the ongoing conflict. China parades its new hypersonic missiles in Tiananmen Square.
So it’s reasonable to think that, to ensure the protection of its homeland and to aid its allies, the U.S. may need a new missile defense capability.
What are the components of a national missile defense system?
Such a defense system requires a global array of geographically distributed sensors that cover all phases of all missile trajectories.
First, it is essential for the system to detect the missile threats as early as possible after launch, so some of the sensors must be located close to regions where adversaries may fire them, such as by China, Russia, North Korea and Iran. Then, it has to track the missiles along their trajectories as they travel hundreds or thousands of miles.
