Not to mention it's an American space program and an American mission. It should probably be understandable to Americans.
I cannot think of an engineering or scientific endeavor in the US that DOESN'T use the metric system.
The US is officially, metric; ansi converts back for the uneducated.
Here's a colorful video: https://youtu.be/SmSJXC6_qQ8?t=63
Here's boring government text: https://www.nist.gov/pml/owm/si-units-mass
This is the type of flamebait we don't need.