SpaceX intend to send craft to Mars on a regular basis. This will provide a supply chain to the planet that they can use and also enable third parties to take advantage. SpaceX eventually want to send a Dragon style craft that can deliver humans and also return to earth. They are hoping that others will use the service to send additional material to further explore the planet or create an infrastructure for human inhabitation.
SpaceX is on schedule to provide this service. Can it work? How might it integrate with other plans for manned missions to Mars?