(Launch webcast begins at 4:30 p.m. EDT)
Live coverage of the United Launch Alliance Atlas 5 rocket flight with NASA’s OSIRIS-REx asteroid sample return probe. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
The U.S. Air Force this week awarded SpaceX a contract to launch a Global Positioning System satellite in early 2019, concluding the second of as many as 15 competitions the military plans to run over the next year to pit SpaceX against United Launch Alliance for rights to lift defense and intelligence-gathering payloads into orbit.
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