Live coverage: Soyuz crew capsule departs station, lands in Kazakhstan

A SpaceX Falcon 9 rocket carrying a Dragon cargo ship loaded with more than 4,000 pounds of supplies and equipment bound for the International Space Station — including a critical docking adapter needed by future U.S. crew ships — broke apart in a shower of debris shortly after launch Sunday.

Spare parts warehoused in the the United States and Russia will help Boeing finish assembly of a third space station docking port to receive arriving astronauts aboard Boeing’s CST-100 Starliner and SpaceX’s Crew Dragon capsules, replacing a unit lost in a Falcon 9 launch failure last year.

Space station commander Chris Cassidy and Robert Behnken plan to float outside Friday for the first of up to four spacewalks needed to complete the replacement of aging batteries in the lab’s solar power system. NASA managers hope to get the work done in time for Behnken and crewmate Douglas Hurley to return to Earth aboard their Crew Dragon capsule by around Aug. 2, officials said Wednesday.