SpaceX has its second mission (first operational) to the ISS set for launch tonight.

SpaceX rocket readied for 1st cargo mission

(CNN) — Controllers at NASA’s Kennedy Space Center spent Sunday preparing for the first commercial cargo flight to the International Space Station, readying a SpaceX rocket for an evening launch.

The Falcon 9 rocket with its unmanned Dragon capsule is scheduled for liftoff at 8:35 p.m. if the weather holds. It will be the first of a dozen NASA-contracted flights to resupply the International Space Station, at a total cost of $1.6 billion.
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The unmanned capsule will be packed with about 1,000 pounds of cargo — everything from low-sodium food kits to clothing and computer hard drives. It’s slated to return in late October with about 2,000 pounds, including scientific experiments and failed equipment that can be repaired and sent back, ISS Program Manager Mike Suffredini said.

NASA TV is broadcasting the launch live.