UPDATE 5:06 a.m. ET:
At 4:47 a.m. ET Saturday, Elon Musk’s private spaceflight company SpaceX will launch a resupply mission to the International Space Station carrying more than 5,000 pounds of research experiments, food, water, and clothing for astronauts. About 10 minutes after lift-off, the reusable Falcon 9 rocket will detach from the cargo capsule and automatically try to land on a robotic floating platform about 200 miles east of Jacksonville, Florida. This will be the first time such a landing has been attempted. Watch the live stream above.