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A flatbed truck transports elements of the Mars Exploration Rovers Mission to the Payload Hazardous Servicing Facility at KSC. The cruise stage, aeroshell and lander for MER-2 are inside the shipping containers. Set to launch in 2003, the Mars Exploration Rover Mission will consist of two identical rovers designed to cover roughly 110 yards (100 meters) each Martian day. 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 rovers will be identical to each other, but will land at different regions of Mars. The first rover has a launch window opening May 30, 2003, and the second rover a window opening June 25, 2003.