SpaceX CRS-11 Prepares for Launch

As a Falcon 9 rocket stands ready for liftoff at the Kennedy Space Center's Launch Complex 39A. The rocket will boost a Dragon resupply spacecraft to the International Space Station. Liftoff is scheduled for 5:55 p.m. EDT. On its 11th commercial resupply services mission to the space station, Dragon will bring up 6,000 pounds of supplies, such as the Neutron star Interior Composition Explorer, or NICER, instrument to study the extraordinary physics of neutron stars.