Indeed, they need to resolve one outstanding item before Crew-3 can lift off — a slight redesign of Crew Dragon's toilet system. That tweak was prompted by an issue experienced on SpaceX's Inspiration4 mission, which sent four private citizens on a three-day trip to orbit last month. After that capsule, named Resilience, returned home, inspections revealed that a tube hooked up to a toilet storage tank had popped loose during flight. This "allowed urine to not go into the storage tank but, essentially, to go into the fan system," Bill Gerstenmaier, vice president of build and flight reliability at SpaceX,...