The crews for the 4th and 5th rotations of the Mars Desert Research Station have been selected. Rotation 4, which will run March 24-April 7, will be commanded by Dr. Judith LaPierre. Dr. LaPierre is a professor of psychology at the University of Quebec in Hull. She has participated in space human factors simulation work in Russia in conjunction with the Russian and Canadian Space Agencies. She is both the first woman to command the MDRS and the first French Canadian. The fifth MDRS crew rotation will run from April 7 to 21 and be commanded by Dr. Bill Clancey of the NASA Ames Research Center. Dr. Clancey is a professional space exploration human factors researcher who has taken part in Mars Society and NASA Haughton Mars Project joint expeditions to the Arctic in 1999 and 2000, and who was a member of the crew of the Mars Society’s Flashline Mars Arctic Research Station during the summer of 2001.