VANDENBERG AIR FORCE BASE, Calif. - Both halves of the fairing for NASA's Orbiting Carbon Observatory-2 mission, or OCO-2, arrive at Space Launch Complex 2 on Vandenberg Air Force Base in California. Operations have begun to hoist the sections of the fairing into the Delta II launcher's environmental enclosure, or clean room, at the top of the pad's tower. The fairing will protect OCO-2 during launch aboard a United Launch Alliance Delta II rocket from Space Launch Complex 2 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.