I had to live through a year of endless replays of "go at throttle up"

it's still traumatizing to this day, please don't screw this up

> hydrogen leaks have plagued the SLS since the beginning. That’s partly because liquid hydrogen is a notoriously tricky fuel to work with, as these tiny molecules can slip through miniscule gaps in seals and joints. It’s also extremely cold (-423 degrees Fahrenheit, or -253 degrees Celsius), which can cause hardware to become brittle and crack