SpaceX’s CRS-3 mission, which has already been delayed for months, was pushed back again today after the Falcon 9 rocket experienced a helium leak. SpaceX said it will fix the leak before the next launch opportunity Friday, though the weather is expected to be poor. The CRS-3 mission will deliver supplies and equipment for experiments to the International Space Station. SpaceX will also deliver a gasket needed to fix a broken backup computer on the ISS.

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