Photos: Atlas 5 rocket aims for International Space Station

The Atlas 5 rocket emerges from the Vertical Integration Facility for rollout to Complex 41 at Cape Canaveral in preparation to launch GPS 2F-10 on Wednesday at 11:36 a.m. EDT.

SpaceX aims to re-launch the Falcon 9 booster Monday that catapulted astronauts Doug Hurley and Bob Behnken toward the International Space Station in May, this time carrying a South Korean military communications satellite while pursuing a record for the quickest turnaround time between flights of an orbital-class rocket stage.

The United Launch Alliance Atlas 5 rocket, standing 197 feet tall and and weighing 1.2 million pounds, unleashes 2.4 million pounds of thrust from its main engine and four solid-fuel boosters at 6:42 p.m. EST (2342 GMT) Saturday to launch the GOES-R weather observer for NASA and NOAA from Cape Canaveral, Florida.