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:Trilobites: Baleen Whales Intermingled as They Evolved, and Share DNA With Distant CousinsNASA Mars mission REVEALED: Swarm of flying bee robots to explore Red Planet in the futureATTACK ON DRONES: High-tech gun can SHOOT down flying menace with radio wavesYellowstone volcano ERUPTION warning: Hundreds of bison dead as fears of mega blast growTrilobites: The Isle of Skye Once Was a Dinosaur PlaygroundNASA Mars mission launch date REVEALED: Find out when NASA is going to Mars