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The competition heats up: SpaceX has successfully launched another Dragon freighter to ISS.
We await word on whether the first stage was able to successfully land vertically on a barge in the Atlantic.
Update: Musk reports that the first stage landed on the barge but “too hard for survival.” Expect some interesting video to follow. I have posted SpaceX’s video of the launch below the fold. Beginning at about 22:45, after first stage separation, you can see it maintain a vertical orientation as it begins its descent.