KENNEDY SPACE CENTER, FLA. - In the Payload Hazardous Servicing Facility, workers stand by while an overhead crane again lifts the cruise stage of Mars Exploration Rover 1 (MER-1). The cruise stage will be integrated with the aeroshell, the entry vehicle. NASA’s twin Mars Exploration Rovers are designed to study the history of water on Mars. These robotic geologists are equipped with a robotic arm, a drilling tool, three spectrometers, and four pairs of cameras that allow them to have a human-like, 3D view of the terrain. Each rover could travel as far as 100 meters in one day to act as Mars scientists' eyes and hands, exploring an environment where humans can’t yet go. The MER-1 is scheduled to launch June 25 from Launch Pad 17-A, Cape Canaveral Air Force Station.