The upper levels of the launch gantry, surrounding the United Launch Alliance Delta II rocket with the Orbiting Carbon Observatory-2 (OCO-2) satellite onboard, are seen at Space Launch Complex 2, Sunday, June 29, 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 Earths climate. OCO-2 is scheduled to launch on July 1 at 5:56 a.m. EDT, 2:56 a.m. PDT.> About OCO-2Image Credit: NASA/Bill Ingalls

More...