SpaceX is scheduled to launch a Falcon 9 rocket on Friday from Cape Canaveral Air Force Station in Florida. The rocket will send the Dragon cargo capsule to the International Space Station. It will be packed with about 7,000 pounds of supplies, experiments and hardware for the ISS. Mice are included in the cargo to test muscle breakdown and bone loss in space. This is the first attempt by SpaceX to launch a Falcon 9 rocket for a resupply mission since June 2015, when the company’s rocket broke apart minutes after liftoff. SpaceX plans to launch its first human crew in 2017.