Note: Sound distortions in first 15 min. Alan Boyle - Science Editor, NBC.com - hosts Golden Spike Board members Doug Griffith and Taber MacCallum. They'll talk about achieving affordable, reliable, and frequent human expeditions to the Moon. Doug Griffith combines an aerospace engineering degree, two decades as a military and civilian pilot, with an aviation-focused law practice. Taber MacCallum is Chief Executive Officer, Chief Technology Officer and Co-founder of Paragon Space Development Corporation. Follow @b0yle @GoldenSpikeCo Read Cosmic Log http://cosmiclog.nbcnews.com/_news/2013/03/06/17212896-beyond-nasa-meet-the-folks-who-are-planning-trips-to-the-moon-and-mars?lite http://goldenspikecompany.com/