Live coverage: International crew lands in Kazakhstan

Managers aborted liftoff of a commercial Antares cargo launcher Saturday when an aircraft strayed into restricted airspace near the rocket’s planned flight path east from Virginia’s Eastern Shore.

Mike Suffredini, manager of NASA’s International Space Station program, is stepping down after 10 years overseeing the lab’s final assembly and transition to post-shuttle operations, the agency said Wednesday. Kirk Shireman, deputy director of the Johnson Space Center, will take over as program manager.

Two NASA astronauts and an Italian flight engineer took shelter in the space station’s Russian segment Wednesday as mission control analyzed a possible leak of toxic ammonia coolant aboard the complex. Initial data indicated it was likely a false alarm.