Propellants are now flowing into Falcon 9 at pad 40

This week at NASA: Prepping for solar storms on Mars, Dragon relocates on the @Space_Station to get ready for #Starliner's arrival, and our solar sail mission successfully phones home. Want more space? nasa.gov/subscribe pic.twitter.com/cfqtJAGVvM

In the first briefing of the countdown, the launch weather team tells mission managers that the forecast for launch of #AtlasV and #Starliner #CFT remains at a 95 percent chance of acceptable conditions for liftoff tonight at 10:34pmEDT (0234 UTC). bit.ly/av_cft pic.twitter.com/d1Nk3BOUzJ

⏰ The #AtlasV countdown just started for tonight's launch of two NASA astronauts aboard the @BoeingSpace #Starliner spacecraft for @NASA's @Commercial_Crew. Liftoff time for the Crew Flight Test #CFT is 10:34:14pmEDT (0234:14 UTC) from Cape Canaveral. bit.ly/av_cft pic.twitter.com/u1V87jEvV4