U.S. companies are `` ready to step up to the plate , '' NASA chief says . The NASA splashed down off U.S. Baja on three-week . Its return completes the first commercial space cargo mission . The capsule carried up nearly 900 pounds of cargo and returned with one .
U.S. companies are `` ready to step up to the plate , '' NASA chief says . The Dragon splashed down off Baja California on Sunday . Its return completes the first commercial space cargo mission . The capsule carried up nearly 900 pounds of cargo and returned with about 1,700 .