Russian space officials watch video footage of researchers in space suits simulating a landing on Mars at the Mission Control Center in Korolyov, just outside Moscow, Monday, Feb. 14, 2011. After 257 days in a locked steel capsule, researchers on a mock trip to Mars ventured from their cramped quarters Monday in heavy space suits, trudging into a sand-covered room to plant flags on a simulated Red Planet. The crew of three Russians, a Frenchman, an Italian-Colombian and a Chinese entered a network of modules at a Moscow research center last June to imitate the 520-day flight and see how they handle the constricted, isolating conditions of space travel _ minus the weightlessness. (AP Photo/Sergey Ponomarev)

Photo by: Sergey Ponomarev

Russian space officials watch video footage of researchers in space suits simulating a landing on Mars at the Mission Control Center in Korolyov, just outside Moscow, Monday, Feb. 14, 2011. After 257 days in a locked steel capsule, researchers on a mock trip to Mars ventured from their cramped quarters Monday in heavy space suits, trudging into a sand-covered room to plant flags on a simulated Red Planet. The crew of three Russians, a Frenchman, an Italian-Colombian and a Chinese entered a network of modules at a Moscow research center last June to imitate the 520-day flight and see how they handle the constricted, isolating conditions of space travel _ minus the weightlessness. (AP Photo/Sergey Ponomarev)