Today’s launch of a SpaceX Falcon 9 to the ISS went well, though the landing of the booster back at the Cape didn’t:

Tweets from Elon Musk indicate a stalled hydraulic pump crippled one of the grid fins that guide the first stage back to the landing platform, imparting a uncontrolled spin to the rocket the other three could not mitigate.

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As part of their SOP, the booster is initially aimed at a point just off shore from the landing pad, so that it will impact the ocean instead should this very even occur.

This is SpaceX’s first failure to land an F9 (that they intended to recover) in 27 attempts going back to 2016.