WASHINGTON, Feb. 26 -- NASA issued the following news release: * * * NASA Remembers Long-Time Civil Servant John Boyd Portrait of John Boyd, whose contributions to NASA spanned more than 70 years. Credit: NASA John Boyd, known to many as Jack and whose career spanned more than seven decades in a multitude of roles across NASA as well as its predecessor, the National Advisory Committee for Aeronautics (NACA), died Feb. 20. He was 99. Born in 1925, and raised in Danville, Virginia, he was a  more