With a very interesting “white board” analysis from the VP of propulsion Tom Mueller.

Behind the Scenes With the World's Most Ambitious Rocket Makers

I love the ending of the article:

NASA says its new reliance on private companies to ferry cargo to the space station will free the agency to focus on manned flights to the moon and, eventually, Mars. But, as the windows on the Dragon indicate, SpaceX has plans that go far beyond handling NASA’s freight. Who knows—at the rate Musk, Mueller and company are going, SpaceX just might reach Mars first.