VANDENBERG AIR FORCE BASE, Calif. – A worker surveys the Delta first-stage booster for NASA's Orbiting Carbon Observatory-2 mission, or OCO-2, secured in a transportation hardware cradle, that he delivered to the Horizontal Processing Facility at Space Launch Complex 2 on Vandenberg Air Force Base in California. OCO-2 is scheduled to launch aboard a United Launch Alliance Delta II rocket in July. The observatory will collect precise global measurements of carbon dioxide in the Earth's atmosphere and provide scientists with a better idea of the chemical compound's impacts on climate change. Scientists will analyze this data to improve our understanding of the natural processes and human activities that regulate the abundance and distribution of this important atmospheric gas. To learn more about OCO-2, visit http://oco.jpl.nasa.gov. Photo credit: NASA/Randy Beaudoin