> Whether Musk becomes a space industry visionary -- or the latest in a string of delusional Don Quixotes -- remains to be seen. Doubters call Musk's vision pie

> Whether Musk becomes a space industry visionary -- or the latest in a string of delusional Don Quixotes -- remains to be seen. Doubters call Musk's vision pie in the sky, a gross underestimation of the technological and commercial challenges SpaceX will face. > But Strategic Insight's Kaplan said that "probably a couple dozen entrepreneurs have tried this in the last 10 years, and they've all gone out of business. It's easy to say you're building a cheap, simple rocket, but that and $2 will get you a cup of coffee at Starbucks."