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KENNEDY SPACE CENTER, FLA. - NASA's Mars Reconnaissance Orbiter (MRO), atop a Lockheed Martin Atlas V rocket, awaits launch at Launch Complex 41 at Cape Canaveral Air Force Station in Florida. The launch was delayed 24 hours to investigate an anomalous reading in the hydrogen propellant loading system on the Atlas V. At the conclusion of the inquiry, the Atlas V was cleared to launch on Aug. 12 between 7:43 and 9:43 a.m. EDT. The spacecraft will arrive at Mars in March 2006. Once in orbit around Mars, various instruments on the MRO will convey detailed observations of the Martian surface, subsurface and atmosphere. Researchers will use the data to study the history and distribution of Martian water. Learning more about what has happened to the water will focus searches for possible past or present Martian life. Observations by the orbiter will also support future Mars missions by examining potential landing sites and providing a communications relay between the Martian surface and Earth.