These were the propellants for the blaze of rage fanned by the world's richest man, Elon Musk, via his social media platform X, demanding a national public inquiry.

Helium, an inert gas, is used to push propellants to the spacecraft’s thrusters.

SpaceX says the team have started loading the propellant - or "prop" for short - into Starship.

Helium, an inert gas, is used to push propellants to the thrusters, and if too much helium is lost, the thrusters may not work properly.

Specifically, the state accused the agency of knowing about the danger of “accumulated propellant” inside range trailers and failing to “take sufficient steps to prevent the re-occurrence of fires in its indoor mobile shooting ranges.”