Nation

Mars Science Lab

ScienceJet Propulsion LaboratoryNASACharles Bolden
In this handout image provided by NASA, the Mars Science Laboratory (MSL) team clap and welcome White House Science and Technology Advisor John Holdren (3rd L), as he stops by to meet the landing team and to say 'Go Curiosity' as NASA Administrator Charles Bolden (2nd L) and Jet Propulsion... Bill Ingalls/NASA via Getty Images
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