The most expensive defence project in American history now has a single name attached to it. On 17 July 2026, the Senate confirmed Space Force General Michael A. Guetlein to run Golden Dome — President Trump’s plan to throw a missile shield over the entire United States — clearing the way for a program that could ultimately cost well over $175 billion.

The vote was a quiet voice vote. The job is anything but quiet. Guetlein now owns an effort that spans the Space Force, the Missile Defense Agency, the Army, the Navy and the Air Force, and that promises to do something no country has ever managed: shoot down ballistic, hypersonic and cruise missiles aimed at the homeland, some of them before they have even finished launching.

The general who drew the short straw — or the plum job

Guetlein is not a surprise pick. Until this week he was Vice Chief of Space Operations, and before that he ran Space Systems Command, served as deputy director of the National Reconnaissance Office, and was a program executive at the Missile Defense Agency. In other words, almost every organisation that will build Golden Dome has already had him as a boss.

He has also been blunt about the scale of what he is taking on. Speaking to defense-industry leaders earlier this year, Guetlein reached for the biggest comparison in American engineering history.

“This is on the order of magnitude of Manhattan Project, and it’s going to take concerted effort from the very top of our government. It’s going to take a national will to bring all this together.”

Gen. Michael A. Guetlein — Director, Golden Dome for America

That is not the language of a man who thinks he has an easy job.

What Golden Dome actually is

Trump floated the idea at his inauguration in January 2025 and approved a Pentagon plan at the end of that May, pinning the cost then at around $175 billion. The concept is layered: satellites in orbit to spot and track a launch within seconds; a mix of ground-, sea- and space-based interceptors to destroy the threat; and an AI-enabled command network to tie it together fast enough to matter. The hardest trick — space-based interceptors that can hit a missile in its boost phase — is also the most futuristic, and the Space Force wants an early capability as soon as 2028.

Critics — including Senator Mark Kelly, a former astronaut and Navy pilot — have questioned whether the physics and the price tag add up, and independent estimates have run far north of the official number. Guetlein’s own answer has been to promise early, visible results rather than a decade of PowerPoint.

For the aviation and air-defence world, Golden Dome is a gravitational event. It pulls in radars, interceptors, sensor aircraft and the entire architecture of how North America watches its skies. Whether it becomes the shield Trump promised or the boondoggle its critics fear, one man is now formally responsible for finding out — and the clock started ticking the moment the Senate said "aye."

Sources: Air & Space Forces Magazine; SpaceNews; Breaking Defense; Fox News; The Hill.