CAPE CANAVERAL, Fla. (AP) - SpaceX stands ready to launch a much-needed load of supplies to the International Space Station this weekend on the heels of a failed supply run by Russia.

CAPE CANAVERAL, Fla. (AP) SpaceX stands ready to launch a much-needed load of supplies to the International Space Station this weekend on the heels of a failed supply run by Russia.

Besides food and experiments, the Dragon cargo ship ordered up by NASA holds the first docking port, or parking place, for future commercial crew capsules.

Liftoff is scheduled for 10:21 a.m. Sunday from Cape Canaveral, Florida. Good weather is forecast.

The 5,300-pound shipment is especially critical, given the space station has lost two deliveries since fall. Last April, a Russian supply ship spun out of control shortly after liftoff. In October, an Orbital Sciences cargo carrier was destroyed in a Virginia launch explosion.

This will be the eighth supply run for the California-based SpaceX.