David A. Spencer is the Mars Sample Return Campaign Mission Manager at the Jet Propulsion Laboratory. As an aerospace engineer, Spencer designs and operates planetary spacecraft.
David A. Spencer is the Mars Sample Return Campaign Mission Manager at the Jet Propulsion Laboratory. As an aerospace engineer, Spencer designs and operates planetary spacecraft. (en)
David A. Spencer is the Mars Sample Return Campaign Mission Manager at the Jet Propulsion Laboratory. As an aerospace engineer, Spencer designs and operates planetary spacecraft. (en)