@nyrath you should better also inform them : "Liquid hydrogen is #NASA’s preferred rocket #fuel, and the new tank, together with the old one, will give the agency the capacity not only to accommodate the larger #fuel requirements of its new #SLS ... a lot of hydrogen is lost as it’s transferred from the rocket #fuel tank back to storage" https://spinoff.nasa.gov/NASA_Hydrogen_History_Informs_World%E2%80%99s_Hydrogen_Future

I suggest it's [2] 😁