NASA and SpaceX called off the Crew-11 launch to the International Space Station just 67 seconds before the scheduled 12:09 p.m. ET liftoff on 31 July. A late-forming bank of cumulus clouds drifted directly over Launch Complex 39A at Florida’s Kennedy Space Center, violating strict flight-safety weather criteria and forcing a scrub. The mission was set to send the Dragon capsule Endeavour on its record-setting sixth flight atop a Falcon 9 booster. Earlier in the countdown, launch controllers had reported the vehicle and crew in good condition and a 90 percent chance of acceptable weather, but the unexpected cloud layer triggered an automatic “no-go.” Teams are now draining propellant and preparing the spacecraft for another attempt. Crew-11 carries an international quartet: NASA commander Zena Cardman, making her first trip to orbit; NASA pilot Mike Fincke on his fourth; Japan Aerospace Exploration Agency astronaut Kimiya Yui on his second; and Roscosmos cosmonaut Oleg Platonov on his debut. The four are slated for roughly 180 days of science and technology demonstrations aboard the station, relieving the Crew-10 residents. NASA and SpaceX said the next launch opportunity is Friday, 1 August, pending resolution of the weather. Endeavour and its crew will remain at the pad while meteorologists monitor conditions for the revised attempt.