Somewhere in the back of my tiny mind I have a strange feeling that people , in this day and age, are being taken to the planet Mars. In order to colonize a planet you would need workers to do the manual labor. Once you are taken there, its work or die and no one here on Earth would know. With an encrypted communication system you would not be allowed to communicate with anyone off-world. the work force or slave labor would be highly motivated as the people in charge could shut off air, refuse to provide food and water. You would need young children to start learning the operations on Mars and to train for future , further and continued exploration.