CAPE CANAVERAL, Fla. (AP) — SpaceX launched its first recycled cargo ship to the International Space Station on Saturday, yet another milestone in its bid to drive down flight costs.

After a two-day delay caused by thunderstorms, the unmanned Falcon rocket blasted off carrying a Dragon capsule that made a station delivery nearly three years ago. When this refurbished Dragon reaches the orbiting lab on Monday, it will be the first returning craft since NASA's now-retired shuttles.

The first-stage booster flown Saturday afternoon was brand new, and as is now the custom, returned to Cape Canavera...