MORE At the Ready Credit: Kim Shiflett/NASA A SpaceX Falcon 9 rocket stands at Kennedy Space Center's Launch Complex 39A, waiting to carry a Dragon resupply spacecraft to the International Space Station (ISS) on Aug. 14, 2017. Everything in Place Credit: Kim Shiflett/NASA Dragon was loaded up with over 6,400 pounds of supplies for this, its 12th commercial resupply mission to the International Space Station. Liftoff! Credit: NASA The Falcon 9 soars into the sky from Pad 39A on Aug. 14, 2017. Ascending Credit: NASA The Falcon 9's first-stage engines power the rocket and Dragon into the Florida sky. Stage Separation Credit: NASA The Falcon 9's first and second stages separate, about 2.5 minutes into flight. Second-Stage Engine Fires Up Credit: NASA The engine on the Falcon 9's second stage pushes Dragon toward the space station. Back to Earth Credit: NASA The first stage heads back down. Falling Fast Credit: NASA The Falcon 9 first stage streaks downward through Earth's atmosphere. Touchdown! Credit: NASA The Falcon 9's first stage settles down at Landing Zone 1, at Florida's Cape Canaveral Air Force Station. Dragon Deploys Credit: NASA Dragon deploys from the Falcon 9's second stage.