Vivienne Machi is the military space editor for Aviation Week. She has written about U.S. and international military and space tech since 2016 from bureaus in Washington, Los Angeles and Stuttgart, Germany. Her byline has appeared in outlets including Defense News, Via Satellite, Foreign Policy, Defense Daily, National Defense Magazine and Business Insider.
DARPA and NASA’s nuclear thermal propulsion project will miss its scheduled 2027 testing time frame, as its development has proven trickier than anticipated.
Derek Tournear, the director of the U.S. Space Development Agency (SDA), has been placed on administrative leave, “pending the results of an investigation.”
