End of the US space shuttle program got you down? It doesn't seem to have phased SpaceX, which is still chipper and chugging right along with plans for its bodacious Falcon Heavy. The company recently broke ground at Complex 4 East at the Vandenberg Air Force Base, which Elon Musk's baby will call home, later next year. With twice the payload-to-orbit capacity of Boeing and Lockheed's Delta IV Heavy, and at a third of the cost, the
