The psychological challenges are interesting.<p>Psychiatrists and psychologists often need to vent to a peer to deal with being the person who counsels others.<p>I imagine or hope that some cross training is performed in the sMARS mission so that one person who is incapacitated doesn&#x27;t create a cascade of other problems (e.g., the French biologist can&#x27;t attend to the life-sustaining Cyanobacteria).<p>A crew member suffering a mental breakdown could doom the mission. Is her medical kit stocked with sedatives? Does increased radiation exposure alter brain structure?<p>So many risks that we know of and some that we don&#x27;t.