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Photographers track an Atlas V rocket with the Juno spacecraft as it lifts off from Space Launch Complex-41 in Cape Canaveral, Fla. on Friday, Aug. 5, 2011. NASA launched the spacecraft atop an unmanned rocket that blasted into a clear midday sky as scientists cheered and yelled "Go Juno!" It was the first step in Juno's 1.7 billion-mile voyage to the gas giant Jupiter, just two planets away but altogether different from Earth and next-door neighbor Mars. (AP Photo/Terry Renna)