A few months http://www.mobatec.nl/web/metoprolol-tartrate-purchase-boundaries.pptx#celebrated metoprolol succ(toprol)er tab 25 mg kfz-zeichen  Mars Direct proposes sending two spacecraft to land on Mars. The spacecraft that the astronauts will fly home in goes first, empty and unfuelled. Once it lands it automatically converts chemicals in the Martian atmosphere into rocket fuel which will power its ascent from the surface and voyage back to Earth.