40 Years Ago: A Look Back At 1977

With help from his parents, David Vetter, 6, of Houston, Texas, walks for the first time outside the isolation bubble he has lived in all his life. David is wearing a germ-free suit called the Mobile Isolator System, developed by NASA in cooperation with the Texas Children’s Hospital, at an estimated cost of $20,000. David was born with severe combined immune deficiency.