Andy Clark is one of the founders of Space Frontier Operations, Inc (SFO). The company was incorporated in 1994 and has been active in the space arena for about fifty years. Initially trained in the UK as an Electrical Engineer, Andy has worked on all sorts of aerospace systems from small weapons to strategic weapons and large unmanned and manned spacecraft - Shuttle and Space Station. Starting in 1997 Andy has been working to make space systems "human sized"; looking at the implications that designing for humans has on the size and complexity of manned spacecraft. Such large spacecraft will bring with them a significant logistics exercise.