UPDATE 5:09 PM ET, APRIL 15: High-res video of SpaceX's launch was temporarily online this afternoon, long enough for internet users to capture the dramatic landing attempt.
Seriously, watch this on full-screen:
UPDATE 4:54 PM ET: Elon Musk says the Falcon's first stage actually landed successfully on the drone platform, but tipped over afterwards because it was moving sideways.
Here's the Falcon approaching the ship:
4:33 PM ET: The third time wasn't quite the charm for SpaceX's attempt to land the first stage of a Falcon 9 rocket on a drone platform at sea. The launch of the ISS resupply mission went off without a hitch, and the rocket stage reached the drone ship, but it landed too hard to survive, SpaceX chief Elon Musk says.
CNN reports: "SpaceX was unable to guide the bottom stage of the Falcon rocket upright onto a floating platform in the Atlantic Ocean."
This was the third try for SpaceX making a vertical landing on the drone platform. During the first test, in January, SpaceX got the Falcon 9 all the way to the platform but couldn't stick the landing, resulting in a fiery crash.
In February, the company decided shortly before launch to skip the platform landing because the weather was bad, and instead set the rocket down gently in the ocean.
We're still waiting for more information and visuals of today's attempted landing. It sounds like the rocket stage got closer to success this time than it did in January.