Spectators watch the final fiery moments of the Starship test flight

A nest of genetically-engineered mice, a research study to observe the behavior of fires in space, and an experiment that could lead to brewing beer in microgravity are among more than 5,700 pounds of cargo inside a SpaceX Dragon capsule awaiting launch from Cape Canaveral to the International Space Station Thursday.

Ground crews took steps this week to prepare for the next Falcon 9 launch, set for no earlier than Jan. 30 with a telecom satellite for SES and the Luxembourg government, as SpaceX officials stressed their rocket was not to blame for the rumored loss of a mysterious U.S. government payload after liftoff Sunday.

A United Launch Alliance Atlas 5 rocket with a new type of solid rocket booster emerged from its hangar Tuesday evening for the 1,800-foot rollout to pad 41 at Cape Canaveral, moving into position for liftoff Wednesday with a classified National Reconnaissance Office payload.