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CAPE KENNEDY, Fla. -- In the AO Building at Cape Kennedy Air Force Station in Florida, the Mariner 3 spacecraft is processed prior to mating with its payload faring. Mariner is one of two identical deep-space probes designed and built by the Jet Propulsion Laboratory for NASA's Mariner Mars 1964 project. Mariner 3 is intended to conduct close-up scientific observations of Mars and transmit information back to Earth on interplanetary space and the space surrounding the Red Planet. Photo Credit: NASA