NSF Live is NASASpaceflight's weekly show covering the latest in spaceflight. On each show, we rotate through various topics, hosts, and guests. Sunday's show at 3 PM EDT features a special guest, Dr. Stefan Brieschenk, COO for Rocket Factory Augsburg, which boasts the European Union's only staged combustion engine, Helix, and is working on launching their RFA-ONE rocket. Today's episode is hosted by Chris Gebhardt (Assistant Managing Editor at NASASpaceflight.com), and John Galloway (Host and Producer for NASASpaceflight.com).Additional coverage: https://www.nasaspaceflight.com/