Video: Orion flight preps

The towering structure to be used for liftoffs of NASA’s Space Launch System rolled from a construction site to launch pad 39B at the Kennedy Space Center in Florida this week, arriving at the seaside complex Friday for a week of fit checks.

NASA is taking steps to rein in costs, emphasizing bonds with private sector companies, and signaling it might be open to a future where the agency’s flagship Orion deep space capsule and Space Launch System are no longer necessary to explore deep space, at least in their current forms.

In a major shakeup at NASA Headquarters, agency Administrator Jim Bridenstine said Wednesday that Bill Gerstenmaier, the widely respected director of human spaceflight, has been replaced in the midst of an ambitious push to meet the Trump administration’s directive to send astronauts back to the moon within five years.