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SpaceX rocket explodes during landing

This is the moment an unmanned SpaceX Falcon rocket exploded on landing after successfully delivering an ocean monitoring satellite to orbit.

This is the moment an unmanned SpaceX Falcon rocket exploded on landing after successfully delivering an ocean monitoring satellite to orbit.

The cause of the problem was that one of the rocket's legs collapsed as it tried to land on a floating ocean barge.

The rocket company had managed a historic first controlled return of an orbital stage last month.

This footage of the landing was posted online by SpaceX CEO, Elon Musk.