Live coverage: Atlas 5 countdown and launch journal

Two U.S. military satellite launches planned for this fall from Cape Canaveral are being delayed to 2018 due to separate factors, the Air Force says.

SpaceX’s first Crew Dragon spacecraft to carry astronauts into orbit arrived at launch pad 39A at the Kennedy Space Center in Florida late Friday, May 15, to be attached to its Falcon 9 rocket. The capsule will carry NASA astronauts Doug Hurley and Bob Behnken to the International Space Station.

NASA has awarded SpaceX a $109 million contract to launch the Interstellar Mapping and Acceleration Probe, a NOAA space weather observatory, a robotic scout to map water on the moon, and two other ridealong payloads on a single Falcon 9 rocket from Cape Canaveral in 2024.