NASA's Cassini spacecraft at Saturn nears fiery finale

NASA's Cassini spacecraft at Saturn closed in on its fiery finish early Friday, following a remarkable journey of 20 years. Cassini was on course to plunge through Saturn's atmosphere and vaporize like a meteor. Flight controllers at California's Jet Propulsion Laboratory expect one last burst of scientific data from Cassini, before the radio waves go flat -- and the spacecraft falls silent.