SpaceX will launch its twenty-first resupply mission to the International Space Station Saturday and set a couple of new records - if weather allows.

First, this mission will mark the first time NASA has allowed a booster to be reused more than three times. It will also mark the first time SpaceX has two Dragon vehicles on the Space Station. The Dragon from an earlier mission, which brought four U.S. astronauts to the station last month, is still docked there, and will be for another five months.

This mission, dubbed CRS-21, will bring food, equipment, supplies and a new set of experiments to the station. It's set to launch from Florida's Kennedy Space Center at 8:39 a.m. PST.

The weather forecast calls for a cold front that has a 50% chance of scuttling the launch, but — should it take place — you watch it below: