Live coverage of the countdown and launch of an Antares rocket from Virginia with Northrop Grumman’s 13th operational Cygnus resupply flight to the International Space Station. Text updates will appear automatically below. Follow us on Twitter.
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Nine Merlin engines ignited and throttled up to nearly 2 million pounds of thrust Sunday during a brief hold-down firing of SpaceX’s Falcon 9 rocket, sending a plume of smoke out of the flame trench at Kennedy Space Center’s historic launch pad 39A as the company preps for a space station cargo mission next weekend.