Drone’s view of Sunday’s SpaceX rocket landing

SpaceX called off a Falcon 9 countdown Wednesday due to the threat of lightning from thunderstorms along Florida’s Space Coast, pushing back the departure of a cargo mission for the International Space Station until Thursday.

Astronauts Jeff Williams and Kate Rubins ventured outside the lab complex Friday for a long-awaited spacewalk to attach a new docking mechanism, the first of two that will be used by U.S. crew ferry ships being built by Boeing and SpaceX to carry astronauts to and from the outpost, ending NASA’s sole reliance on Russian Soyuz spacecraft.

A Falcon 9 rocket is lifted into position for a planned countdown dress rehearsal at launch pad 39A at the Kennedy Space Center. The rocket is being readied for launch early Sunday with the EchoStar 23 communications satellite.