Adam Steltzner, Mars Science Laboratory (MSL) entry, descent and landing phase lead, Jet Propulsion Laboratory, holds a model of the MSL spacecraft during a briefing held at the Jet Propulsion Laboratory on Thursday, August 2, 2012 in Pasadena, Calif. The MSL Rover named Curiosity was designed to assess whether Mars ever had an environment able to support small life forms called microbes. Curiosity is due to land on Mars at 10:31 PDT on Aug. 5, 2012 (1:31 EDT on Aug. 6, 2012). Photo Credit: (NASA/Bill Ingalls) Adam Steltzner at MSL Briefing (201208020004HQ)

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