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On Launch Pad 17-B, Cape Canaveral Air Force Station, the Mars Exploration Rover 1 (MER-B) is ready to be lifted up the tower for mating with the Delta rocket. The second of twin rovers being sent to Mars, it is equipped with a robotic arm, a drilling tool, three spectrometers, and four pairs of cameras that allow it 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. MER-B is scheduled to launch June 26 at one of two available times, 12:27:31 a.m. EDT or 1:08:45 a.m. EDT.