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KENNEDY SPACE CENTER, Fla. -- After rollback of the Mobile Service Tower (right), the Delta II rocket with the Genesis spacecraft on top sits on Launch Complex 17-A, Cape Canaveral Air Force Station, ready for liftoff. A gray overcast sky forecasts a questionable launch effort due to weather conditions. Genesis will be on a robotic NASA space mission to collect just 10 to 20 micrograms -- or the weight of a few grains of salt -- of solar wind, invisible charged particles that flow outward from the Sun -- and return them to Earth. This treasured smidgen of the Sun will be preserved in a special…
