Shuttle Atlantis unwrapped ahead of public debut

Officials from NASA and SpaceX briefed the media on Monday’s scheduled launch of a commercial Dragon spacecraft on an automated resupply mission to the International Space Station. It will be the 12th SpaceX cargo flight to the research outpost.

Almost exactly three days after taking off a few miles to the north at the Kennedy Space Center on SpaceX’s historic first crew launch, a 15-story-tall Falcon rocket booster returned to Florida’s Space Coast Tuesday aboard a football field-sized drone ship.

SpaceX scrubbed an attempt to launch a commercial Falcon 9 rocket Sunday less than a minute before liftoff, blaming a sensor issue on the vehicle’s first stage and pushing back the company’s first national security mission for the U.S. government at least 24 hours.