Premature shutdown of Atlas 5

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In the heat of competition: The first stage Russian engine in the Atlas 5 rocket that put Cygnus in orbit this week shut down six seconds prematurely for reasons that are as yet unclear.

The early shutdown had no effect on the Cygnus mission, as the Atlas 5’s upper stage compensated for it by burning longer. Nonetheless, ULA has opened an investigation to find out what caused the early shutdown.

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