See how NASA's Orbiting Carbon Observatory (OCO) - 2 spacecraft was assembled ahead of it's encapsulation into the payload fairing and mating to the top of the Delta II rocket. Launch is set for July 1st 2014. OCO-2 is a NASA mission designed to provide global space-based observations of atmospheric carbon dioxide (CO2), OCO-2 is a rebuild of the satellite after the original was lost in a launch failure onboard a Taurus rocket in 2009.