Shuttle Atlantis unwrapped ahead of public debut

Catching a break from nearby thunderstorms, a SpaceX Falcon 9 rocket soared through mostly cloudy skies into space Saturday on the 100th launch from historic pad 39A in Florida, sending a fresh batch of supplies and experiments to the International Space Station.

SpaceX’s next Falcon 9 rocket launch, using a previously-flown first stage booster, took a step closer to liftoff Thursday with a countdown rehearsal culminating in ignition of the launcher’s nine Merlin main engines in a hold-down firing at pad 39A at NASA’s Kennedy Space Center in Florida.

SpaceX rolled out a Falcon 9 rocket to launch pad 39A early Tuesday for a prelaunch hotfire test before this weekend’s liftoff with a classified payload for the National Reconnaissance Office, the U.S. government spy satellite agency. The static fire test was completed at 3:02 p.m. (1902 GMT).