Falcon 9 lifts off on its most important mission to date: carrying NASA Astronauts Bob Behnken and Doug Hurley into orbit.. Trevor Mahlmann Another shot of liftoff. Trevor Mahlmann The Falcon 9 rocket climbs to space on Saturday. Trevor Mahlmann A streak of light, out of sight. NASA Birds of a feather NASA A wide shot. NASA The rain showers ended. The clouds parted. And so on Saturday afternoon, SpaceX's Falcon 9 rocket had blue skies above it during the final minutes of a countdown to launch from Kennedy Space Center in Florida. The Falcon 9 rocket had launched 84 times before. In fact, no U.S. rocket now flying has launched as much as the Falcon 9 rocket. So, this was all kind of routine in that sense. But for the first time, the Falcon 9 rocket carried two humans on board, inside a Crew Dragon spacecraft. That changed everything. So much was at stake, the immensity of this almost became too much to bear as the clock ticked down. Two human lives, NASA astrona..