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KENNEDY SPACE CENTER, FLA. - This insignia of the Mars Exploration Rover resides on the wall of the Payload Hazardous Servicing Facility where the processing for the two rovers is going on. There are two identical rovers that will land at different regions of Mars and are designed to cover roughly 110 yards each Martian day over various terrain. Each rover will carry five scientific instruments that will allow it to search for evidence of liquid water that may have been present in the planet's past. The first rover, MER-A, is scheduled to launch June 5 from Cape Canaveral Air Force Station. The second is scheduled for launch June 25.