NASA should drop the idea of quick-hit missions to Mars in the style of the Apollo lunar program and instead adopt a longer view, a former Jet Propulsion Laboratory (JPL) director said Saturday. “Apollo is not a particularly good model for the exploration of Mars,” said Bruce Murray, a Caltech planetary scientist who led the NASA lab from 1976 to 1982, speaking on Saturday at the 112th annual meeting of The Astronomical Society of the Pacific.