>> three russians, a chinese man and two europeans. they did train as astronauts for a year before the mission. they are surviving and getting on really well. >> really? these people wouldn't actually go on the mission. >> exactly. >> they are helping them understand what it would be like. no sunlight, no fresh food. >> the space is around 1,700 square meters, the capsule space for living quarters about the size of two buses combined. what do they do for entertainment? they even experience karoke. as you said, no fresh food, and they literally walked onto marches this weekend. a kind of large sandpit. the things they don't have in a simulated experience is the gravity issue. the suits are so heavy, 70 pounds of suit. >> to carry that around. >> to carry that around. and no radiation, so a couple of