Boeing gave the US the B52 and 747, the Spacex BFR will be bigger than either

Boeing gave the US military long range conventional bombing superiority for decades with the B52 and commercial aviation dominance with the 747.

The fully reusable Spacex BFR will have more military and commercial impact than the B52 and the 747 combined.

The weapon would naturally contain a large kinetic energy, because it moves at orbital velocities, at least 8 kilometers per second. As the rod would approach Earth it would necessarily lose most of the velocity, but the remaining energy would cause considerable damage. Some systems are quoted as having the yield of a small tactical nuclear bomb. These designs are envisioned as a bunker buster. As the name suggests, the ‘bunker buster’ is powerful enough to destroy a nuclear bunker. With 6–8 satellites on a given orbit, a target could be hit within 12–15 minutes from any given time, less than half the time taken by an ICBM and without the launch warning. Such a system could also be equipped with sensors to detect incoming anti-ballistic missile-type threats and relatively light protective measures to use against them.

A 6.1 m × 0.3 m tungsten cylinder impacting at Mach 10 has a kinetic energy equivalent to approximately 11.5 tons of TNT (or 7.2 tons of dynamite). Every flight of a Spacex BFR could add 150 tons of hypersonic ammunition to a deployed Rods from God space system.

The USA could have a fleet of over 200 Spacex BFR by 2025.

The US has recently talked about creating a sixth branch of the military, a Space Corp.

A fleet of 200 Spacex BFR and orbital space station would be a transformative non-nuclear force.

Instead of spending at least $50 billion on a long range bomber program and tens of billions on hypersonic missiles,