Workers monitor the progress of the rollback of the launch gantry from the United Launch Alliance Delta II rocket with the Orbiting Carbon Observatory-2 (OCO-2) satellite onboard, at Space Launch Complex 2, Monday, June 30, 2014, Vandenberg Air Force Base

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Workers monitor the progress of the rollback of the launch gantry from the United Launch Alliance Delta II rocket with the Orbiting Carbon Observatory-2 (OCO-2) satellite onboard, at Space Launch Complex 2, Monday, June 30, 2014, Vandenberg Air Force Base, Calif. OCO-2 will measure the global distribution of carbon dioxide, the leading human-produced greenhouse gas driving changes in Earth’s climate. OCO-2 is set for a July 1, 2014 launch.

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Photo credit: © NG Images / Alamy / Afripics
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Keywords: 2, air, astronomy, base, bill, ca, california, carbon, complex, delta, force, gantry, ii, ingalls, launch, nasa, observatory-2, orbiting, pad, rocket, rollback, space, usa, vafb, vandenberg