Sorry, some of the superscript got stripped out when copy/pasting to HN. The actual calculation is below: >2.6 x 1021²¹ kilograms (5.7 x 1021²¹ pounds) of prop

Sorry, some of the superscript got stripped out when copy/pasting to HN. The actual calculation is below: >2.6 x 1021²¹ kilograms (5.7 x 1021²¹ pounds) of propellant They don't say what propellant though, but I assume whatever kind of jet fuel they used at the time.