Elon Musk is a busy man. He's also a man who isn't afraid to speak his mind, as we found out during his SXSW keynote earlier this year. This evening, he's capping off a day of interviews at D11 with one of his own. As CEO of both Tesla Motors and SpaceX, he knows a thing or two about transportation -- both within this atmosphere and beyond. Grab a cup of cocoa and join us after the break as we cover it live, won't you?