Trump's Golden Dome missile defense plan could cost $1.2 trillion

A Congressional Budget Office report says Donald Trump's proposed Golden Dome missile defense plan could cost about $1.2 trillion.

The estimate centres on space-based interceptors, which the report says do not currently exist.

The report said those interceptors would probably account for about 60% of the total cost.

No further breakdown was provided in the supplied material.

The estimate is significant because it puts a large price tag on a major proposed defence project before any system has been built.

It also highlights the scale of the technical and financial challenge involved in space-based missile defence.

Golden Dome is being discussed as a missile defence concept rather than an operational system.

The new estimate may shape debate over whether the plan is affordable and how it would be funded.

The only confirmed source detail supplied is the budget office assessment and its estimate for the share linked to space-based interceptors.

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