Robert Lightfoot, NASA’s Acting Administrator, to Retire as Trump’s Nominee Is Stalled Mr. Lightfoot has filled in since the end of the Obama administration, and the agency has never gone this long without a leader confirmed by the Senate. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Eclipse 2018: What time will the partial solar eclipse be visible on Saturday?Touching the SunEclipse 2018: How to watch the partial solar eclipse THIS WEEKENDPerseid meteor shower: Earth’s atmosphere better protected against DEADLY space rocksNASA Parker Solar Probe launch LIVE: Watch NASA rocket launch online HEREToday the Parker Solar Probe Is Named for Him. 60 Years Ago, No One Believed His Ideas About the Sun.