Bill Gaubatz has died. Bill was a leader of the revolutionary DC-X reusable spaceplane program, which had great success with its small demonstrator but could never find the money to go further. He continued working on spaceplanes and other reusable launchers, and I met him at spaceplane conferences in the 1990s and 2000s. He was a great guy as well as being a leader in the pursuit of more affordable, routine space transportation.
Here's SF writer Jerry Pournelle's farewell blog post.