Not a splashdown, after delivering cargo to the space station, but a powered,upright landing on a floating platform in the Atlantic. You know, like in the old science fiction novels.
At least that’s today’s plan.
And if it doesn’t work, SpaceX will keep trying until it does. Because Elon Musk’s vision requires a reusable rocket-to-orbit-and-return to make its ultimate goal practicable: Mars!
UPDATE: At 6:10 a.m. EST, Musk tweeted: “Need to investigate the upper stage Z actuator. Was behaving strangely. Next launch attempt on Friday at 5am.”