Video: Delta 4-Heavy tower rollback

Fifty years to the day after Neil Armstrong stepped onto the surface of the moon, a NASA astronaut, an Italian flight engineer and a Russian commander blasted off from Kazakhstan Saturday aboard a Soyuz spacecraft, chased down the International Space Station and glided in for a picture-perfect docking.

Engineers plan to redesign part of the Orion capsule’s self-righting flotation system that only partially engaged as the spacecraft splashed down in the Pacific Ocean following an orbital test flight in December, NASA officials said.

Orbital ATK has cinched $188 million in contracts to complete development of the Orion crew capsule’s needle-shaped launch abort system, resuming work stalled in the wake up a major shakeup of NASA’s human spaceflight program by the Obama administration in 2010.