Robert Lightfoot is NASA’s Acting Administrator, a role he added January 20 in addition to his permanent position for the last five years as NASA’s Associate Administrator, the agency\u27s highest-ranking civil servant position. Lightfoot actually is a rocket scientist. He began his NASA career 28 years ago as a space shuttle main engine test engineer at Marshall Space Flight Center in 1989. He spent his early career in testing and propulsion at Marshall and later at Stennis Space Center. Following the loss of Columbia, he spent two years at NASA Headquarters for return to flight activities and initial transition and retirement efforts for space shuttle infrastructure. He then returned to Marshall where he spent the next seven years in vari...