Thank you, mister chairman. Let me introduce our witnesses. First witness today is Mister William gerstenmaier, associate administrator at nasa. William gerstenmaier began his nasa career in 1977 performing Aeronautical Research and he has managed nasas human spaceflight portfolio since 2011, received a bachelors of science aeronautical engineering from Purdue University and a masters of science in Mechanical Engineering from university of toledo. Our second witness today is Sandra Sandra magnus, executive director of astronautics. In addition to her role there, Sandra Magnus is a former and nasa astronaut and prior to that worked as a practicing engineer in the aerospace industry. Sandra magnus received a degree in physics as well as a masters degree in Electrical Engineering from Missouri University of science and technology. She also earned a phd from the school of material science and engineering at georgia tech and now recognize William Gerstenmaier for five minutes to present his